ports/173540: devel/libical: Update to 0.48

[mezz at FreeBSD.org]

Synopsis: devel/libical: Update to 0.48

State-Changed-From-To: open->closed
State-Changed-By: mezz
State-Changed-When: Sun Dec 30 05:14:20 UTC 2012
State-Changed-Why: 
I have committed the update of it. Your patch is incomplete, but I have
completed it anyway. Thanks for remind of new version available.

http://www.freebsd.org/cgi/query-pr.cgi?pr=173540