colord: remove destroy listener on clean-up

This was forgetting to remove the compositor destroy listener, which would lead
to use-after-free on compositor tear-down especially on cms-colord init failure
paths. Found by inspection.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

compositor/cms-colord.c

@@ -466,6 +466,7 @@ colord_module_destroy(struct cms_colord *cms)
 	g_free(cms->pnp_ids_data);
 	g_hash_table_unref(cms->pnp_ids);
 
+	wl_list_remove(&cms->destroy_listener.link);
 	free(cms);
 }