equal objects (same m_refData).
Implemented new ref counting for wxBrush, wxPen
and wxColour (in addition to wxRegion). Also
inlined some more functions and implemented
real comparisons.
Corrected refresh code to update GTK's window-less
widgets if overdrawn after a wxWindow::Refresh().
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13999 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775