x11-toolkits/pango update to 1.30 fails to build

[gtodd at bellanet.org]

Posting this for the benefit of search engines and seekers.

Following the most recent ports update to pango (svn 313633) I was unable 
to get it to build properly until I rebuilt cairo with this bit flipped:

WITH GLIB "Enable GObject Functions Feature"

A bunch of interdependent ports (glib gtk gobject-introspection etc) were 
were also rebuit, so I'm not sure what broke but it seems similar to what 
is described here:

http://lists.freebsd.org/pipermail/freebsd-ports/2012-June/075519.html


Regards