Added OS/2 patches to wxGTK.

Updated docs.
  Added wxMask code.
  Added Sylvain's newest tree ctrl code and sample.
  Corrected wxDC background colour (now as wrong as wxMSW).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2767 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/image/image.cpp

@@ -200,6 +200,7 @@ void MyCanvas::CreateAntiAliasedBitmap()
   dc.DrawText( "And a Rectangle.", 20, 60 );
   
   dc.SetBrush( *wxRED_BRUSH );
+  dc.SetPen( *wxTRANSPARENT_PEN );
   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
   
   wxImage original( bitmap );