compositor-drm: fix cursor size test in drm_assign_planes

In commit 70d337dfd we changed one cursor size test from a hard coded 64,64
to the actual device provided width, height.

The test in drm_assign_planes remained fixed at 64, 64.

The simple-shm test ended up being small enough to fit into a cursor plane
by one test, but too large by the test in drm_assign_planes.  We'd assign
to the cursor plane but not keep a reference.

weston-simple-shm would disappear and be replaced with the previous
cursor image.

This partially "fixes" T3361.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
1 file changed