Fixed problem with tab traversal in wxSpinCtrl (added SetFocus())

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5294 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/spinctrl.h

@@ -67,6 +67,7 @@ public:
 protected:
     virtual void DoMoveWindow(int x, int y, int width, int height);
     virtual wxSize DoGetBestSize() const;
+    virtual void SetFocus();
 
     // the handler for wxSpinButton events
     void OnSpinChange(wxSpinEvent& event);