[libpng17] Don't recognize known sRGB profiles as sRGB if they have been hacked,

but don't reject them and don't issue a copyright violation warning.
diff --git a/png.c b/png.c
index d1f94b1..f0c9d4c 100644
--- a/png.c
+++ b/png.c
@@ -696,13 +696,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.7.0beta32 - February 6, 2014" PNG_STRING_NEWLINE \
+     "libpng version 1.7.0beta32 - February 26, 2014" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.7.0beta32 - February 6, 2014\
+      return "libpng version 1.7.0beta32 - February 26, 2014\
       Copyright (c) 1998-2014 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -2203,15 +2203,16 @@
             }
          }
 
-#        if PNG_sRGB_PROFILE_CHECKS > 0
-            /* The signature matched, but the profile had been changed in some
-             * way.  This is an apparent violation of the ICC terms of use and,
-             * anyway, probably indicates a data error or uninformed hacking.
-             */
-            if (png_sRGB_checks[i].have_md5)
-               png_benign_error(png_ptr,
-                  "copyright violation: edited ICC profile ignored");
-#        endif
+# if PNG_sRGB_PROFILE_CHECKS > 0
+         /* The signature matched, but the profile had been changed in some
+          * way.  This probably indicates a data error or uninformed hacking.
+          * Fall through to "no match".
+          */
+         png_chunk_report(png_ptr,
+             "Not recognizing known sRGB profile that has been edited", 
+             PNG_CHUNK_WARNING);
+         break;
+# endif
       }
    }