Log Message:
Revert previous, and instead require glib2 >= 2.4.0nb2.  The reason is that
the fix is really in glib2, not libglade2 (which hasn't changed at all).
libglade2's revision was bumped to pick up glib2 too, but this has nothing
to do with fixing evolution, so bumping the required glib2 version is more
realistic.