[clutter/clutter-1.8] paint-volume: Don't try to complete a completed volume

[Emmanuele Bassi <ebassi src gnome org>]

commit dba6a39dce99a691e9dca112db14152fe72c6df6
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Fri Sep 30 17:02:57 2011 +0100

    paint-volume: Don't try to complete a completed volume
    
    If we do project() â get_bounding_box(), we'll try to complete the
    volume twice, which whacks out all the lazily computed vertices.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 clutter/clutter-paint-volume.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter-paint-volume.c b/clutter/clutter-paint-volume.c
index 7514c13..512c49c 100644
--- a/clutter/clutter-paint-volume.c
+++ b/clutter/clutter-paint-volume.c
@@ -654,6 +654,9 @@ _clutter_paint_volume_complete (ClutterPaintVolume *pv)
   if (pv->is_empty)
     return;
 
+  if (pv->is_complete)
+    return;
+
   /* Find the vector that takes us from any vertex on the left face to
    * the corresponding vertex on the right face. */
   dx_l2r = pv->vertices[1].x - pv->vertices[0].x;