Log Message:
Update to 1.103:

Overview of changes in Gtk2 1.103
=================================

* Depend on Glib 1.103 for the new object registration semantics. Make use of
  them.  [Torsten]

Overview of changes in Gtk2 1.102
=================================

* Handle unknown event types gracefully.  [muppet]
* Improve some of the Gtk2::Gdk::GC API and fix a leak in Gtk2::Gdk::Pixbuf.
  [Marc Lehmann]
* Fix a few test suite issues.  [Scott Lanning, Torsten]