animation.c: Schedule a repaint when the animation is done

Otherwise we don't repaint with the final state of the surface and
we're stuck with the second-to-last frame of the animation until
something else (moving the mouse or such) triggers a redraw.

https://bugs.freedesktop.org/show_bug.cgi?id=70930
diff --git a/src/animation.c b/src/animation.c
index 5eacb7b..c71b506 100644
--- a/src/animation.c
+++ b/src/animation.c
@@ -167,6 +167,7 @@
 	weston_spring_update(&animation->spring, msecs);
 
 	if (weston_spring_done(&animation->spring)) {
+		weston_view_schedule_repaint(animation->view);
 		weston_view_animation_destroy(animation);
 		return;
 	}