Pullup ticket #3530 - requested by hans
graphics/png: build fix

Revisions pulled up:
- graphics/png/distinfo                                        1.87
- graphics/png/patches/patch-aa                                1.31

---
  Module Name: pkgsrc
  Committed By: hans
  Date: Wed Oct  5 16:23:39 UTC 2011

  Modified Files:
  pkgsrc/graphics/png: distinfo
  pkgsrc/graphics/png/patches: patch-aa

  Log Message:
  Fix typo to make this build again on SunOS.

(tron)