implemented wxWindowDC and wxClientDC::GetSize() properly (fixes bug #503022)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14372 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/dcclient.h

@@ -49,6 +49,9 @@ protected:
     // intiialize the newly created DC
     void InitDC();
 
+    // override some base class virtuals
+    virtual void DoGetSize(int *width, int *height) const;
+
 private:
     DECLARE_DYNAMIC_CLASS(wxWindowDC)
 };
@@ -67,6 +70,9 @@ public:
 protected:
     void InitDC();
 
+    // override some base class virtuals
+    virtual void DoGetSize(int *width, int *height) const;
+
 private:
     DECLARE_DYNAMIC_CLASS(wxClientDC)
 };