Original commit message from CVS:
2005-06-27  Andy Wingo  <wingo@pobox.com>

* gst/videotestsrc/gstvideotestsrc.c
(gst_videotestsrc_activate_push): Activation API changes.

* gst/playback/gstdecodebin.c (gst_decode_bin_change_state)
(gst_decode_bin_dispose): Free dynamics in READY->NULL, because
they have refs on the decodebin.

* ext/ogg/gstoggdemux.c (gst_ogg_pad_class_init): Ref the right
parent class.
(gst_ogg_pad_typefind): Don't leak a pad ref.
(gst_ogg_chain_new_stream): gst_object_unref, not g_object_unref.
(gst_ogg_demux_sink_activate, gst_ogg_demux_sink_activate_push)
(gst_ogg_demux_sink_activate_pull): Changes for activation API.