Original commit message from CVS:
* ext/ogg/gstoggmux.c: (gst_ogg_mux_queue_pads),
(gst_ogg_mux_get_headers), (gst_ogg_mux_send_headers),
(gst_ogg_mux_collected), (gst_ogg_mux_change_state):
Fix EOS on multiple streams.
More debugging.