This fixes display issue with YUV420/I420 and NV12 formats, that
can result in crash of weston.
The master branch has this fix as part of commit 148920f3971d "weston:
Bump version to 3.0.0". The patch has been rebased to apply cleanly
to weston 2.0.0.
(From OE-Core rev: bdf87b453867d2f74d97c0a7e0f71902a47b11fb)
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>