don't use wxLocale if wxUSE_INTL==0 (fixes 2nd part of bug 1692898)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45598 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/richtext/richtextxml.cpp

@@ -544,7 +544,9 @@ bool wxRichTextXMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream&
     {
         if (m_encoding == wxT("<System>"))
         {
+#if wxUSE_INTL
             fileEncoding = wxLocale::GetSystemEncodingName();
+#endif // wxUSE_INTL
         }
         else
         {