Log message:
Pullup ticket #5955 - requested by taca
graphics/png: security update

Revisions pulled up:
- graphics/png/Makefile                                         1.198
- graphics/png/distinfo                                         1.142

-------------------------------------------------------------------
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Wed Apr 17 07:05:21 UTC 2019

   Modified Files:
   	pkgsrc/graphics/png: Makefile distinfo

   Log message:
   png: update to 1.6.37.

   This is largely a bugfix-only release. Most importantly, it contains
   a fix for a use-after-free vulnerability (CVE-2019-7317) affecting
   the simplified libpng API, and a fix for a memory leak affecting the
   ARM NEON implementation of the palette-to-RGB(A) expansion.

   To generate a diff of this commit:
   cvs rdiff -u -r1.197 -r1.198 pkgsrc/graphics/png/Makefile
   cvs rdiff -u -r1.141 -r1.142 pkgsrc/graphics/png/distinfo