Set the object for the context menu event.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@50643 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/window.cpp

@@ -3546,6 +3546,7 @@ void wxWindowMac::OnMouseEvent( wxMouseEvent &event )
         wxContextMenuEvent evtCtx(wxEVT_CONTEXT_MENU,
                                   this->GetId(),
                                   this->ClientToScreen(event.GetPosition()));
+        evtCtx.SetEventObject(this);
         if ( ! GetEventHandler()->ProcessEvent(evtCtx) )
             event.Skip() ;
     }