don't use implicit wxString->char*/wchar_t* conversion, it will not be available in wxUSE_STL build in the future

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46391 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/richtext/richtextxml.cpp

@@ -573,7 +573,7 @@ bool wxRichTextXMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream&
 
     wxString s ;
     s.Printf(wxT("<?xml version=\"%s\" encoding=\"%s\"?>\n"),
-        (const wxChar*) version, (const wxChar*) fileEncoding );
+             version, fileEncoding);
     OutputString(stream, s, NULL, NULL);
     OutputString(stream, wxT("<richtext version=\"1.0.0.0\" xmlns=\"http://www.wxwidgets.org\">") , NULL, NULL);