ports/172012: graphics/apngasm: Update to version 2.7

[jhale at FreeBSD.org]

Synopsis: graphics/apngasm: Update to version 2.7

State-Changed-From-To: open->closed
State-Changed-By: jhale
State-Changed-When: Wed Nov 7 22:33:23 UTC 2012
State-Changed-Why: 
Port was handed over to new maintainer with ports/173206 and was updated
to 2.7.

http://www.freebsd.org/cgi/query-pr.cgi?pr=172012