Semi Malinen
99f8c08559
When displays are hot (un)plugged, it may happen that a shell surface is left with a stale pointer to an output that has already been freed. Add an output destroy listener to catch such situations and set the output pointer to NULL. Signed-off-by: Semi Malinen <semi.malinen@ge.com> Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>