Added partial payment option

booking.paypal.inc

@@ -255,6 +255,8 @@ function _booking_process_payment($data) {
 		{
 			watchdog('booking', 'This balance payment of !payment was insufficient for !id to completely pay the total outstanding of !outstanding.', 
 					array('!id' => $nid, '!payment' => $data['mc_gross'], '!outstanding' => $amount_owing));	
+			//send the person an email thanking them for their partial payment
+			_booking_partialbalance_payment_email($nid);
 			//TODO: create an email specifically for partial-balance payments
 			//_booking_registration_email($nid, $balance_payment);			
 		}