Rebuilt configure scripts with autoconf 2.63
diff --git a/ANNOUNCE b/ANNOUNCE
index 1bb26c4..283e1a1 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
-Libpng 1.4.0beta57 - April 25, 2009
+Libpng 1.4.0beta57 - May 2, 2009
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@@ -436,7 +436,10 @@
Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
warning about a global "gamma" variable in math.h on some platforms.
-version 1.4.0beta57 [April 25, 2009]
+version 1.4.0beta57 [May 2, 2009]
+ Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
+ but was never defined (again).
+ Rebuilt configure scripts with autoconf-2.61 instead of 2.60
version 1.4.0betaN [future]
Build shared libraries with -lz and sometimes -lm.