Original commit message from CVS:
* gst/videotestsrc/gstvideotestsrc.c:
(gst_video_test_src_pattern_get_type),
(gst_video_test_src_set_pattern):
* gst/videotestsrc/gstvideotestsrc.h:
* gst/videotestsrc/videotestsrc.c: (gst_video_test_src_unicolor),
(gst_video_test_src_black), (gst_video_test_src_white),
(gst_video_test_src_red), (gst_video_test_src_green),
(gst_video_test_src_blue):
* gst/videotestsrc/videotestsrc.h:
Add more uni-colour patterns ("white", "red", "green", and "blue").