improve query for person based on tempid

booking.balance.inc

@@ -24,10 +24,20 @@ function booking_balance_page() {
 
 	//work out the node id from the session id
 	$query = db_select('booking_person', 'p');		
+  $db_and = db_and()->condition('p.booking_eventid', $event->eid, '=')
+            ->condition('p.booking_tempid', arg(1), '=');
+	$query->condition($db_and);
+	$query->fields('p', array('nid'));
+	$person = $query->execute()
+		->fetchObject();		
+
+	/*
+	$query = db_select('booking_person', 'p');
 	$query->condition('p.booking_tempid', arg(1), '=')
 		->fields('p', array('nid'));
 	$person = $query->execute()
 		->fetchObject();	
+	*/
 	
 	if ($person) {
 		//load all the fields