Update libpng to 1.2.26.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@6060 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

png/ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.2.16 - January 31, 2007
+Libpng 1.2.25 - February 18, 2008
 
 This is a public release of libpng, intended for use in production codes.
 
@@ -8,39 +8,59 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.2.16.tar.gz
-   libpng-1.2.16.tar.bz2
+   libpng-1.2.25.tar.gz
+   libpng-1.2.25.tar.lzma
+     (Get the lzma codec from <http://tukaani.org/lzma>).
+   libpng-1.2.25.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.2.16-no-config.tar.gz
-   libpng-1.2.16-no-config.tar.bz2
+   libpng-1.2.25-no-config.tar.gz
+   libpng-1.2.25-no-config.tar.lzma
+   libpng-1.2.25-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1216.zip
-   lpng1216.tar.bz2
+   lpng1225.zip
+   lpng1225.7z
+   lpng1225.tar.bz2
 
 Project files
 
-   libpng-1.2.16-project-netware.zip
-   libpng-1.2.16-project-wince.zip
+   libpng-1.2.25-project-netware.zip
+   libpng-1.2.25-project-wince.zip
 
 Other information:
 
-   libpng-1.2.16-README.txt
-   libpng-1.2.16-KNOWNBUGS.txt
-   libpng-1.2.16-LICENSE.txt
-   libpng-1.2.16-Y2K-compliance.txt
-
-Changes since the last public release (1.2.15):
-
-version 1.2.16 [January 31, 2007]
-
-  Fix bugs in makefile.nommx
-  Revised scripts/CMakeLists.txt
+   libpng-1.2.25-README.txt
+   libpng-1.2.25-KNOWNBUGS.txt
+   libpng-1.2.25-LICENSE.txt
+   libpng-1.2.25-Y2K-compliance.txt
+   libpng-1.2.25-1.2.24-diff.txt
+
+Changes since the last public release (1.2.24):
+
+version 1.2.25 [February 18, 2008]
+
+  Fixed bug with unknown chunk handling, introduced in version 1.2.17
+  Prevent gamma from being applied twice.
+  Fixed some continue-after-malloc-failure errors in pngset.c (David Hill)
+  Check for info_ptr == NULL in png_read_info() and png_process_data().
+  Check for possible use of NULL user_png_ver[] in png_create_read_struct().
+  Fix overflow of "msg" in png_decompres_chunk().
+  Added libpng-1.2.25.tar.lzma to distribution.  Get the lzma codec
+    from <http://tukaani.org/lzma>.
+  Added lpng1225.7z to distribution.  Get the 7-zip decoder from
+    from <http://www.7-zip.org>.
+  Fixed some broken links in the README file.
+  Refactored png_read_push_finish_row() slightly, trying to satisfy Coverity.
+  Fixed potential NULL dereference of png_ptr in png_destroy_write_struct();
+  clarified potential NULL dereference of png_ptr in png_destroy_read_struct();
+  fixed potential NULL dereference of info_ptr in png_handle_bKGD();
+  fixed potential NULL dereference of user_png_ver[] in
+    png_create_write_struct_2(). (Coverity)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit