How gsetttings looks for schemata.c

/*
 * Copyright © 2010 Codethink Limited
 * Copyright © 2011 Canonical Limited
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the licence, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
// snip
      dirs = g_get_system_data_dirs ();
      for (i = 0; dirs[i]; i++);

      while (i--)
        {
          gchar *filename;
          GvdbTable *table;

          filename = g_build_filename (dirs[i], "glib-2.0", "schemas", "gschemas.compiled", NULL);
          table = gvdb_table_new (filename, TRUE, NULL);

          if (table != NULL)
            prepend_schema_table (table);

          g_free (filename);
        }
//snip