Update for GST_FOURCC_FORMAT API change.

Update for GST_FOURCC_FORMAT API change.

Original commit message from CVS:
* ext/directfb/dfbvideosink.c:
(gst_dfbvideosink_get_format_from_caps):
* ext/sdl/sdlvideosink.c: (gst_sdlvideosink_create):
* gst/qtdemux/qtdemux.c: (gst_qtdemux_loop_header),
(qtdemux_parse), (qtdemux_type_get), (qtdemux_node_dump_foreach),
(qtdemux_dump_hdlr), (qtdemux_dump_dref), (qtdemux_dump_stsd),
(qtdemux_dump_dcom), (qtdemux_parse_trak), (qtdemux_video_caps),
(qtdemux_audio_caps):
* sys/v4l2/gstv4l2src.c: (gst_v4l2src_v4l2fourcc_to_caps):
* sys/v4l2/v4l2src_calls.c: (gst_v4l2src_fill_format_list),
(gst_v4l2src_capture_init), (gst_v4l2src_get_size_limits):
Update for GST_FOURCC_FORMAT API change.