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/gtk/toplevel.h

@@ -121,6 +121,10 @@ protected:
                            int width, int height,
                            int sizeFlags = wxSIZE_AUTO);
 
+    virtual void DoSetSizeHints( int minW, int minH,
+                                 int maxW = wxDefaultCoord, int maxH = wxDefaultCoord,
+                                 int incW = wxDefaultCoord, int incH = wxDefaultCoord );
+                                 
     virtual void DoSetClientSize(int width, int height);
     virtual void DoGetClientSize( int *width, int *height ) const;