ports/96214: Update port: graphics/pngcrush to 1.6.3

[Volker Stolz]

Synopsis: Update port: graphics/pngcrush to 1.6.3

State-Changed-From-To: open->closed
State-Changed-By: vs
State-Changed-When: Tue Apr 25 16:03:11 UTC 2006
State-Changed-Why: 
Committed with minor modifications, thanks:
- I did use MAKE_ARGS instead of post-patch
- Installation seemed broken since the executable was now called pngcrush-zlib

http://www.freebsd.org/cgi/query-pr.cgi?pr=96214