Original commit message from CVS:
* examples/seeking/seek.c: (end_scrub), (do_seek), (seek_cb),
(start_seek), (stop_seek):
Add realtime scrubbing to the seek example.
* ext/ogg/gstoggdemux.c: (gst_ogg_demux_perform_seek):
Avoid overflowing 64-bits on large files when estimating
the new position during a seek.