[mutter] Check the opacity of the right actor

[Owen Taylor <otaylor src gnome org>]

commit f03d39eefbb72334542193d552e991edd1a2a948
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Fri Aug 14 15:52:30 2009 -0400

    Check the opacity of the right actor
    
    When determining if the window is opaque or not, look at it's opacity,
    not the opacity of the window group.
    
    Reported by Matthias Clasen
    http://bugzilla.gnome.org/show_bug.cgi?id=591836

 src/compositor/mutter-window-group.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/compositor/mutter-window-group.c b/src/compositor/mutter-window-group.c
index 2436edf..e89327e 100644
--- a/src/compositor/mutter-window-group.c
+++ b/src/compositor/mutter-window-group.c
@@ -136,7 +136,7 @@ mutter_window_group_paint (ClutterActor *actor)
 
       mutter_window_set_visible_region (cw, visible_region);
 
-      if (clutter_actor_get_paint_opacity (actor) == 0xff)
+      if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (cw)) == 0xff)
         {
           GdkRegion *obscured_region = mutter_window_get_obscured_region (cw);
           if (obscured_region)