ext/pango/gsttextoverlay.c: Fix wrong EOS handling on text pad. We were releasing the queued text buffer when we shou...

Original commit message from CVS:
2006-03-07  Julien MOUTTE  <julien@moutte.net>

* ext/pango/gsttextoverlay.c: (gst_text_overlay_text_event),
(gst_text_overlay_video_event): Fix wrong EOS handling on text
pad. We were releasing the queued text buffer when we should keep
it until video pad gets EOS or discard the text buffer because it's
too old. That was eating the last subtitle buffer. Add some more
debug.