Original commit message from CVS:
2006-02-10  Andy Wingo  <wingo@pobox.com>

* gst/gst.defs (disable_sync_message_emission)
(enable_sync_message_emission): Wrap new functions from GStreamer
CVS.

* configure.ac (GST_REQ): Require GStreamer 0.10.3.1.

* examples/play.py: A bit of refactoring. Make use of the
sync-message signals. Reacts to events on the bus. Keeps aspect
ratio. Better scrubbing, play/pause button instead of
play+pause+stop. Not a bad player now, although the code still
lacks cleanliness.