Fixes a few SGI compiler warnings..

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2436 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/combobox.h

@@ -75,6 +75,11 @@ public:
   void SetClientObject( int n, wxClientData* clientData );
   wxClientData* GetClientObject( int n );
   
+  void SetClientObject( wxClientData *data )  { wxControl::SetClientObject( data ); }
+  wxClientData *GetClientObject() const       { return wxControl::GetClientObject(); }
+  void SetClientData( void *data )            { wxControl::SetClientData( data ); }
+  void *GetClientData() const                 { return wxControl::GetClientData(); }
+    
   void Clear();
   void Delete( int n );