'grey border' bug under MSW fixed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5034 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/framecmn.cpp

@@ -265,9 +265,9 @@ void wxFrameBase::OnSize(wxSizeEvent& WXUNUSED(event))
             // for whatever reasons, wxGTK wants to have a small offset - it
             // probably looks better with it?
 #ifdef __WXGTK__
-            static const int ofs = 0;
-#else
             static const int ofs = 1;
+#else
+            static const int ofs = 0;
 #endif
 
             child->SetSize(ofs, ofs, clientW - 2*ofs, clientH - 2*ofs);