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/unix/dir.cpp

@@ -132,7 +132,7 @@ bool wxDirData::Read(wxString *filename)
             return false;
 
 #if wxUSE_UNICODE
-        de_d_name = wxConvFileName->cMB2WC( de->d_name );
+        de_d_name = wxString(de->d_name, *wxConvFileName);
 #else
         de_d_name = de->d_name;
 #endif