[libpng14] Bump version to 1.4.13beta02

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.4.13beta01 - December 10, 2012
+Libpng 1.4.13beta02 - January 1, 2013
 
 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.
@@ -9,20 +9,20 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.4.13beta01.tar.xz (LZMA-compressed, recommended)
-   1.4.13beta01.tar.gz
-   1.4.13beta01.tar.bz2
+   1.4.13beta02.tar.xz (LZMA-compressed, recommended)
+   1.4.13beta02.tar.gz
+   1.4.13beta02.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1413b01.7z (LZMA-compressed, recommended)
-   lp1413b01.zip
+   lp1413b02.7z (LZMA-compressed, recommended)
+   lp1413b02.zip
 
 Other information:
 
-   1.4.13beta01-README.txt
-   1.4.13beta01-LICENSE.txt
+   1.4.13beta02-README.txt
+   1.4.13beta02-LICENSE.txt
 
 Changes since the last public release (1.4.11):
 
@@ -32,11 +32,13 @@ version 1.4.12 [July 10, 2012]
     pngsuite/README.txt.
   Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.
 
-version 1.4.13beta01 [December 10, 2012]
+version 1.4.13beta01 [January 1, 2013]
   Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3.
   Removed references to png_zalloc() and png_zfree() from the manual.
   Ignore, with a warning, out-of-range value of num_trans in png_set_tRNS().
 
+version 1.4.13beta02 [January 1, 2013]
+
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