Original commit message from CVS:
Make sure set_explicit_caps() is called before adding pad.
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_loop):
* gst/id3/gstid3types.c: (gst_id3types_loop):
* gst/mpegstream/gstmpegdemux.c: (gst_mpeg_demux_parse_syshead):
* gst/realmedia/rmdemux.c: (gst_rmdemux_add_stream):