wlr_scene: Don't cull the entire output when entering direct scanout

We don't need to.

types/scene/wlr_scene.c

@@ -1504,8 +1504,10 @@ bool wlr_scene_output_commit(struct wlr_scene_output *scene_output) {
 		scene_output->prev_scanout = scanout;
 		wlr_log(WLR_DEBUG, "Direct scan-out %s",
 			scanout ? "enabled" : "disabled");
-		// When exiting direct scan-out, damage everything
+		if (!scanout) {
-		wlr_damage_ring_add_whole(&scene_output->damage_ring);
+			// When exiting direct scan-out, damage everything
+			wlr_damage_ring_add_whole(&scene_output->damage_ring);
+		}
 	}
 
 	if (scanout) {