Pullup ticket #3486 - requested by dholland

Pullup ticket #3486 - requested by dholland
chat/amsn build fix

Revisions pulled up:
- chat/amsn/Makefile                                            1.21
- chat/amsn/distinfo                                            1.8-1.9
- chat/amsn/patches/patch-utils_TkCximage_src_CxImage_ximapng.cpp 1.2-1.3

---
   Module Name:	pkgsrc
   Committed By:	dholland
   Date:		Mon Aug  1 00:43:59 UTC 2011

   Modified Files:
   	pkgsrc/chat/amsn: distinfo
   	pkgsrc/chat/amsn/patches: patch-utils_TkCximage_src_CxImage_ximapng.cpp

   Log Message:
   Improve png-1.5 support. Still broken: writing palettes and transparency.

---
   Module Name:	pkgsrc
   Committed By:	dholland
   Date:		Mon Aug  1 01:16:50 UTC 2011

   Modified Files:
   	pkgsrc/chat/amsn: Makefile distinfo
   	pkgsrc/chat/amsn/patches: patch-utils_TkCximage_src_CxImage_ximapng.cpp

   Log Message:
   Fix build with png-1.5, fully now. Also add various REPLACE_INTERPRETER
   and add a dependency on Python for the two installed Python scripts. No
   version bump since this hasn't been buildable in a long time.