twin: fix showWindowMenuAt(...) DCOP call

Before it only called slotWindowOperations(), which showed the operations menu of the current window at a preset position, ignoring all arguments passed to showWindowMenuAt.

This commit implpements the correct behaviour of the function which takes all arguments into account.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

twin/useractions.cpp

@@ -647,10 +647,12 @@ bool Client::performMouseCommand( Options::MouseCommand command, TQPoint globalP
     return replay;
     }
 
-// KDE4 remove me
-void Workspace::showWindowMenuAt( unsigned long, int, int )
+void Workspace::showWindowMenuAt( unsigned long window, int x, int y )
     {
-    slotWindowOperations();
+    Client *client;
+    if ((client = findClient(WindowMatchPredicate((WId)window))))
+        showWindowMenu( x, y, client );
+
     }
 
 void Workspace::slotActivateAttentionWindow()