fixed client area handling for wxFrame/Univ

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11665 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/frame.h

@@ -49,6 +49,9 @@ public:
 protected:
     void OnSize(wxSizeEvent& event);
 
+    virtual void DoGetClientSize(int *width, int *height) const;
+    virtual void DoSetClientSize(int width, int height);
+
 #if wxUSE_MENUS
     // override to update menu bar position when the frame size changes
     virtual void PositionMenuBar();