Original commit message from CVS:
* gst/audioconvert/gstaudioconvert.c: (gst_audio_convert_chain),
(gst_audio_convert_caps_remove_format_info),
(gst_audio_convert_setcaps), (gst_audio_convert_fixate),
(gst_audio_convert_change_state), (gst_audio_convert_channels):
* gst/videotestsrc/gstvideotestsrc.c:
(gst_videotestsrc_src_negotiate), (gst_videotestsrc_src_link),
(gst_videotestsrc_parse_caps), (gst_videotestsrc_src_accept_caps),
(gst_videotestsrc_setcaps), (gst_videotestsrc_activate),
(gst_videotestsrc_init), (gst_videotestsrc_loop):
Don't ignore _push() return values.
Make sure no processing is done when shutting down.
Videotestsrc pad activation fix.