Yet another workaround for the crappy systray mechanism, looking forward

to deprecate it. The tray should work again now.

svn path=/trunk/kdebase/kwin/; revision=263494

events.cpp

@@ -290,6 +290,10 @@ bool Workspace::workspaceEvent( XEvent * e )
 
         case ReparentNotify:
             {
+            // Check if a systray has been reparented back to the root window, even if not mapped.
+            // QXEmbed doesn't map the window when reparenting back.
+            if( e->xreparent.parent == root )
+                addSystemTrayWin( e->xreparent.window );
         //do not confuse Qt with these events. After all, _we_ are the
         //window manager who does the reparenting.
             return TRUE;