Log message:
Pullup ticket #4243 - requested by he
graphics/png: build fix

Revisions pulled up:
- graphics/png/Makefile                                         1.163
- graphics/png/distinfo                                         1.108

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Mon Sep 30 18:17:03 UTC 2013

   Modified Files:
   	pkgsrc/graphics/png: Makefile distinfo

   Log message:
   Update to 1.6.6:

   Version 1.6.6 [September 16, 2013]
     Removed two stray lines of code from arm/arm_init.c, again.