gst_video_frame_map() increases the refcount, which makes
the buffer not writable any more technically, so calling
gst_buffer_memset() on it will cause nasty warnings.
Unit test disabled because it very rarely (for me)
fails, possibly negotiation-related.
https://bugzilla.gnome.org/show_bug.cgi?id=684398
Original commit message from CVS:
Patch by: René Stadler <mail at renestadler dot de>
* tests/check/pipelines/simple-launch-lines.c:
Tests for #498395.
Original commit message from CVS:
Patch by: Timo Hotti <Timo.Hotti@sysopendigia.com>
* tests/check/Makefile.am:
* tests/check/pipelines/simple-launch-lines.c:
Add unit tests for payloaders/depayloaders.
