[totem] backend: Don't try to paint 0-sized actors

[Bastien Nocera <hadess src gnome org>]

commit 76f5de992b7fed65183d1e6d6dd03ed583014f53
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Jun 27 15:13:47 2012 +0100

    backend: Don't try to paint 0-sized actors
    
    If the child will end up with one of the dimensions being zero,
    don't bother trying to pain it.

 src/backend/totem-aspect-frame.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/backend/totem-aspect-frame.c b/src/backend/totem-aspect-frame.c
index af4eae2..346464b 100644
--- a/src/backend/totem-aspect-frame.c
+++ b/src/backend/totem-aspect-frame.c
@@ -155,6 +155,9 @@ totem_aspect_frame_allocate (ClutterActor           *actor,
   box_height = box->y2 - box->y1;
   clutter_actor_get_preferred_size (child, NULL, NULL, &width, &height);
 
+  if (width <= 0.0f || height <= 0.0f)
+    return;
+
   aspect = box_width / box_height;
   child_aspect = width / height;