[libpng16] Revised contrib/pngminim/*/makefile to generate pnglibconf.h

with the right zlib headers.

CHANGES

diff --git a/CHANGES b/CHANGES
index e8fcb9f..c40c6fa 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4552,7 +4552,12 @@
   Added information in the documentation about problems with and fixes for
     the bad CRC and bad iTXt chunk situations.
 
-Version 1.6.3beta06 [May 9, 2013]
+Version 1.6.3beta06 [May 10, 2013]
+  Allow contrib/pnminus/pnm2png.c to compile without WRITE_INVERT and WRITE_PACK
+    supported (writes error message that it can't read P1 or P4 PBM files).
+  Improved png-fix-too-far-back usage message, added --suffix option.
+  Revised contrib/pngminim/*/makefile to generated pnglibconf.h with the
+    right ZLIB_VERNUM.
 
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