[libpng16] Bump version to 1.6.27
diff --git a/CHANGES b/CHANGES
index 180084c..f4636ee 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5772,7 +5772,7 @@
 
 Version 1.6.27 [December 29, 2016]
   Fixed a potential null pointer dereference in png_set_text_2() (bug report
-    and patch by Patrick Keshishian)
+    and patch by Patrick Keshishian).
 
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