Rooms Unit Access function

In order to be consistent with the permission function (there's also an error on argument name), the access function should be :

/**
 * Determines whether the given user has access to a bookable unit.
 *
 * @param $op
 *   The operation being performed. One of 'view', 'update', 'create', 'delete'
 *   or just 'edit' (being the same as 'create' or 'update').
 * @param $room
 *   Optionally a unit or a unit type to check access for. If nothing is
 *   given, access for all units is determined.
 * @param $account
 *   The user to check for. Leave it to NULL to check for the global user.
 * @return boolean
 *   Whether access is allowed or not.
 */
function rooms_unit_access($op, $room = NULL, $account = NULL) {
	if (user_access('administer bookable units', $account)) {
    return TRUE;
  }
  if (isset($room) && $type_name = $room->type) {
    $op = ($op == 'view') ? 'view' : 'edit';
    if (user_access("$op any $type_name bookable unit", $account)) {
      return TRUE;
    }
  }
  return FALSE;
}