fixed wide char codeset detection for systems which do support LE/BE variants (broken by recent commit)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35716 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/strconv.cpp

@@ -1365,7 +1365,7 @@ wxMBConv_iconv::wxMBConv_iconv(const wxChar *name)
         };
 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
 
-        for ( ; *names; ++names )
+        for ( ; *names && ms_wcCharsetName.empty(); ++names )
         {
             const wxString nameCS(*names);