compositor-drm: Zero drmModeAddFB2 data

Initialize arrays of data passed to drmModeAddFB2, just as
drm_fb_get_from_bo does.

See https://lists.freedesktop.org/archives/wayland-devel/2016-August/030645.html

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
1 file changed