Merge lp:~dbarth/compiz-core/mumble-fix into lp:compiz-core/oneiric

[David Barth]

I have tested that fix backported from the dev. trunk and confirmed it to fix the issue with mumble.

Test case:
- start mumble
- open the dash at the same time

Issue: the dash appears under other windows; the alt-tab switcher too

With the patch applied, the dash correctly appears on top of the mumble window; that alt-tab switcher as well

=== modified file 'src/window.cpp'
--- src/window.cpp	2011-08-23 13:28:57 +0000
+++ src/window.cpp	2011-09-02 17:04:23 +0000
@@ -2182,6 +2182,9 @@
     if (w->overrideRedirect ())
 	return true;
 
+    if (w->destroyed ())
+	return true;
+
     if (!w->priv->shaded && !w->priv->pendingMaps)
     {
 	if (!w->isViewable () || !w->isMapped ())
@@ -3470,7 +3473,8 @@
 	    }
 	}
 
-	mask |= priv->addWindowStackChanges (&xwc, sibling);
+	if (sibling)
+	    mask |= priv->addWindowStackChanges (&xwc, sibling);
     }
 
     mask |= priv->addWindowSizeChanges (&xwc, priv->serverGeometry);