Make wxWindow::SetSizeHints() do nothing.

Make wxTLW::SetSizeHints() set the various m_minWidth etc. fields.
  Override SetSizeHints() in wxGTK to call the relevant gtk funcion
    only there and not in every resize.
  Make GetMinWidth() etc. non-virtual.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42646 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/toplevel.h

@@ -250,6 +250,10 @@ public:
     virtual void DoUpdateWindowUI(wxUpdateUIEvent& event) ;
 
 protected:
+    virtual void DoSetSizeHints( int minW, int minH,
+                                 int maxW = wxDefaultCoord, int maxH = wxDefaultCoord,
+                                 int incW = wxDefaultCoord, int incH = wxDefaultCoord );
+
     // the frame client to screen translation should take account of the
     // toolbar which may shift the origin of the client area
     virtual void DoClientToScreen(int *x, int *y) const;