notice that it has become unfortunately impossible (or at least much more difficult) to maintain compilation when wxRICHTEXT_DERIVES_FROM_TEXTCTRLBASE is unset so I simply removed it as the code wouldn't compile anyhow git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41755 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775