[devel] Changed char *msg to PNG_CONST char *msg in pngrutil.c

CHANGES

diff --git a/CHANGES b/CHANGES
index 1dacdbe..f6b6731 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2740,6 +2740,7 @@
   Made FIXED and FLOATING options consistent in the APIs they enable and
     disable.  Corrected scripts/options.awk to handle both command line
     options and options specified in the .dfa files.
+  Changed char *msg to PNG_CONST char *msg in pngrutil.c
   Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
     floating point APIs, but not both.