Log Message:
Pullup ticket #5049 - requested by taca
graphics/optipng: security fix

Revisions pulled up:
- graphics/optipng/Makefile                                     1.33
- graphics/optipng/distinfo                                     1.29
- graphics/optipng/patches/patch-src_optipng_osys.c             deleted

---
   Module Name:	pkgsrc
   Committed By:	adam
   Date:		Fri Jun 17 14:03:10 UTC 2016

   Modified Files:
   	pkgsrc/graphics/optipng: Makefile distinfo
   Removed Files:
   	pkgsrc/graphics/optipng/patches: patch-src_optipng_osys.c

   Log Message:
   Version 0.7.6
   -------------
    * Upgraded libpng to version 1.6.21.
    ! Fixed an assertion failure in the image reduction code.
   !! Fixed various security-sensitive defects in the BMP decoder.
    ! Fixed a benign uninitialized memory read in the GIF decoder.
    ! Fixed a build failure occurring under the Estonian (et_EE) locale.
    ! Fixed a build failure occurring on Mac OS X, FreeBSD, and possibly
      other systems that lack POSIX-compliant high-resolution timestamps.
    ! Fixed a typo causing build failures in 32-bit ANSI C compilation.