Change version from libpng-1.2.37rc01 to libpng-1.2.37beta03

Because of many cosmetic changes, drop back to beta and do rc01 later.
diff --git a/png.h b/png.h
index ac75f9a..918fba8 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.37rc01 - May 19, 2009
+ * libpng version 1.2.37beta03 - May 19, 2009
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -8,7 +8,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.2.37rc01 - May 19, 2009: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.37beta03 - May 19, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -169,65 +169,65 @@
  *    1.0.30                  10    10030  10.so.0.30[.0]
  *    1.2.22                  13    10222  12.so.0.22[.0]
  *    1.2.23beta01-05         13    10223  12.so.0.23[.0]
- *    1.2.23rc01              13    10223  12.so.0.23[.0]
+ *    1.2.23beta03              13    10223  12.so.0.23[.0]
  *    1.2.23                  13    10223  12.so.0.23[.0]
  *    1.2.24beta01-02         13    10224  12.so.0.24[.0]
- *    1.2.24rc01              13    10224  12.so.0.24[.0]
+ *    1.2.24beta03              13    10224  12.so.0.24[.0]
  *    1.2.24                  13    10224  12.so.0.24[.0]
  *    1.2.25beta01-06         13    10225  12.so.0.25[.0]
- *    1.2.25rc01-02           13    10225  12.so.0.25[.0]
+ *    1.2.25beta03-02           13    10225  12.so.0.25[.0]
  *    1.0.31                  10    10031  10.so.0.31[.0]
  *    1.2.25                  13    10225  12.so.0.25[.0]
  *    1.2.26beta01-06         13    10226  12.so.0.26[.0]
- *    1.2.26rc01              13    10226  12.so.0.26[.0]
+ *    1.2.26beta03              13    10226  12.so.0.26[.0]
  *    1.2.26                  13    10226  12.so.0.26[.0]
  *    1.0.32                  10    10032  10.so.0.32[.0]
  *    1.2.27beta01-06         13    10227  12.so.0.27[.0]
- *    1.2.27rc01              13    10227  12.so.0.27[.0]
+ *    1.2.27beta03              13    10227  12.so.0.27[.0]
  *    1.0.33                  10    10033  10.so.0.33[.0]
  *    1.2.27                  13    10227  12.so.0.27[.0]
  *    1.0.34                  10    10034  10.so.0.34[.0]
  *    1.2.28                  13    10228  12.so.0.28[.0]
  *    1.2.29beta01-03         13    10229  12.so.0.29[.0]
- *    1.2.29rc01              13    10229  12.so.0.29[.0]
+ *    1.2.29beta03              13    10229  12.so.0.29[.0]
  *    1.0.35                  10    10035  10.so.0.35[.0]
  *    1.2.29                  13    10229  12.so.0.29[.0]
  *    1.0.37                  10    10037  10.so.0.37[.0]
  *    1.2.30beta01-04         13    10230  12.so.0.30[.0]
- *    1.0.38rc01-08           10    10038  10.so.0.38[.0]
- *    1.2.30rc01-08           13    10230  12.so.0.30[.0]
+ *    1.0.38beta03-08           10    10038  10.so.0.38[.0]
+ *    1.2.30beta03-08           13    10230  12.so.0.30[.0]
  *    1.0.38                  10    10038  10.so.0.38[.0]
  *    1.2.30                  13    10230  12.so.0.30[.0]
- *    1.0.39rc01-03           10    10039  10.so.0.39[.0]
- *    1.2.31rc01-03           13    10231  12.so.0.31[.0]
+ *    1.0.39beta03-03           10    10039  10.so.0.39[.0]
+ *    1.2.31beta03-03           13    10231  12.so.0.31[.0]
  *    1.0.39                  10    10039  10.so.0.39[.0]
  *    1.2.31                  13    10231  12.so.0.31[.0]
  *    1.2.32beta01-02         13    10232  12.so.0.32[.0]
- *    1.0.40rc01              10    10040  10.so.0.40[.0]
- *    1.2.32rc01              13    10232  12.so.0.32[.0]
+ *    1.0.40beta03              10    10040  10.so.0.40[.0]
+ *    1.2.32beta03              13    10232  12.so.0.32[.0]
  *    1.0.40                  10    10040  10.so.0.40[.0]
  *    1.2.32                  13    10232  12.so.0.32[.0]
  *    1.2.33beta01-02         13    10233  12.so.0.33[.0]
- *    1.2.33rc01-02           13    10233  12.so.0.33[.0]
- *    1.0.41rc01              10    10041  10.so.0.41[.0]
+ *    1.2.33beta03-02           13    10233  12.so.0.33[.0]
+ *    1.0.41beta03              10    10041  10.so.0.41[.0]
  *    1.2.33                  13    10233  12.so.0.33[.0]
  *    1.0.41                  10    10041  10.so.0.41[.0]
  *    1.2.34beta01-07         13    10234  12.so.0.34[.0]
- *    1.0.42rc01              10    10042  10.so.0.42[.0]
- *    1.2.34rc01              13    10234  12.so.0.34[.0]
+ *    1.0.42beta03              10    10042  10.so.0.42[.0]
+ *    1.2.34beta03              13    10234  12.so.0.34[.0]
  *    1.0.42                  10    10042  10.so.0.42[.0]
  *    1.2.34                  13    10234  12.so.0.34[.0]
  *    1.2.35beta01-03         13    10235  12.so.0.35[.0]
- *    1.0.43rc01-02           10    10043  10.so.0.43[.0]
- *    1.2.35rc01-02           13    10235  12.so.0.35[.0]
+ *    1.0.43beta03-02           10    10043  10.so.0.43[.0]
+ *    1.2.35beta03-02           13    10235  12.so.0.35[.0]
  *    1.0.43                  10    10043  10.so.0.43[.0]
  *    1.2.35                  13    10235  12.so.0.35[.0]
  *    1.2.36beta01-05         13    10236  12.so.0.36[.0]
- *    1.2.36rc01              13    10236  12.so.0.36[.0]
+ *    1.2.36beta03              13    10236  12.so.0.36[.0]
  *    1.0.44                  10    10044  10.so.0.44[.0]
  *    1.2.36                  13    10236  12.so.0.36[.0]
  *    1.2.37beta01-03         13    10237  12.so.0.37[.0]
- *    1.2.37rc01              13    10237  12.so.0.37[.0]
+ *    1.2.37beta03              13    10237  12.so.0.37[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -257,7 +257,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.2.37rc01, May 19, 2009, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.2.37beta03, May 19, 2009, are
  * Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -375,7 +375,7 @@
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.2.37rc01 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.37beta03 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -431,9 +431,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.37rc01"
+#define PNG_LIBPNG_VER_STRING "1.2.37beta03"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.37rc01 - May 19, 2009\n"
+   " libpng version 1.2.37beta03 - May 19, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  13
@@ -1493,7 +1493,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_2_37rc01;
+typedef png_structp version_1_2_37beta03;
 
 typedef png_struct FAR * FAR * png_structpp;