Roles are not translated

Roles are not translated in _forum_access_forum_form function.

  $roles = array();
  $result = db_query(db_rewrite_sql("SELECT r.rid, r.name FROM {role} r ORDER BY r.name", 'r', 'rid'));
  while ($obj = db_fetch_object($result)) {
    $roles[$obj->rid] = check_plain($obj->name);
  }