compositor: Update only existing backgrounds in output_move

diff --git a/compositor/compositor.c b/compositor/compositor.c
index 23465da..01fb257 100644 (file)
--- a/compositor/compositor.c
+++ b/compositor/compositor.c
@@ -1327,9 +1327,11 @@ wlsc_output_move(struct wlsc_output *output, int x, int y)
        output->x = x;
        output->y = y;
 
-       output->background->x = x;
-       output->background->y = y;
-       wlsc_surface_update_matrix(output->background);
+       if (output->background) {
+               output->background->x = x;
+               output->background->y = y;
+               wlsc_surface_update_matrix(output->background);
+       }
 
        pixman_region32_init(&output->previous_damage_region);