In a follow-up patch we may have glyphs with a NULL picture. To cope with
that, always set the pictures for glyphs to NULL at creation time and cope
with cleaning up such glyphs. Also, since compositing a NULL source doesn't
do a lot anyway, skip trying to do so.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit 758ab55d2d)
30ebee3bfc