compositor: free regions in wlsc_output_repaint()

Some of the local pixman region objects were not being properly
destroyed before returning from the function. Destroy them, fixes
some Valgrind errors.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>

compositor/compositor.c

@@ -805,11 +805,14 @@ wlsc_output_repaint(struct wlsc_output *output)
 			wlsc_surface_draw(es, output, &repaint);
 			pixman_region32_subtract(&es->damage,
 						 &es->damage, &output->region);
+			pixman_region32_fini(&repaint);
 		}
 	}
 
 	if (ec->fade.spring.current > 0.001)
 		fade_output(output, ec->fade.spring.current, &total_damage);
+
+	pixman_region32_fini(&total_damage);
 }
 
 struct wlsc_frame_callback {