if ( count( $params['prtype'] ) || $params['prexpiry'] != 'all' ) {
$this->addTables( 'page_restrictions' );
$this->addWhere( 'page_id=pr_page' );
if ( count( $params['prtype'] ) || $params['prexpiry'] != 'all' ) {
$this->addTables( 'page_restrictions' );
$this->addWhere( 'page_id=pr_page' );