[mutter] Don't unredirect non fully opaque windows

[Adel Gadllah <agadllah src gnome org>]

commit abde64cb0ca93789bbdc11749943c145c806e8ff
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Fri Sep 16 21:26:21 2011 +0200

    Don't unredirect non fully opaque windows
    
    When a window is set to be translucent with _NET_WM_WINDOW_OPACITY it shouldn't
    be unredirected as this will cause the hint to have no effect.

 src/compositor/meta-window-actor.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/compositor/meta-window-actor.c b/src/compositor/meta-window-actor.c
index 747da8a..7b3c07c 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -1218,7 +1218,7 @@ meta_window_actor_should_unredirect (MetaWindowActor *self)
   MetaWindow *metaWindow = meta_window_actor_get_meta_window (self);
   MetaScreen *screen = meta_window_get_screen (metaWindow);
 
-  if (meta_window_is_override_redirect (metaWindow))
+  if (meta_window_is_override_redirect (metaWindow) && self->priv->opacity == 0xff)
     {
       int screen_width, screen_height;
       MetaRectangle window_rect;