allow specifying the size of wxDCTemp and do specify it for the one used with wxEraseEvents

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41475 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -4365,7 +4365,7 @@ void wxWindowMSW::OnPaint(wxPaintEvent& event)
 
 bool wxWindowMSW::HandleEraseBkgnd(WXHDC hdc)
 {
-    wxDCTemp dc(hdc);
+    wxDCTemp dc(hdc, GetClientSize());
 
     dc.SetHDC(hdc);
     dc.SetWindow((wxWindow *)this);