compositor: Clean up view output move and destroy listeners

Remove those listeners when the output is destroyed, otherwise they'll
point to invalid data that may lead to corruption when assigning a new
output for the view.

--
This is possibly related to bug 72845. I didn't have enough equipment
to try and reproduce it.

https://bugs.freedesktop.org/show_bug.cgi?id=72845

src/compositor.c

@@ -413,6 +413,12 @@ weston_view_output_destroy_handler(struct wl_listener *listener,
 
 	if (ev->surface->output_destroyed)
 		ev->surface->output_destroyed(ev->surface);
+
+	wl_list_remove(&ev->output_move_listener.link);
+	wl_list_remove(&ev->output_destroy_listener.link);
+
+	wl_list_init(&ev->output_move_listener.link);
+	wl_list_init(&ev->output_destroy_listener.link);
 }
 
 WL_EXPORT struct weston_view *