More ADSL updates and fixes from live site

modules/invoice/classes/Model/Invoice.php

@@ -746,11 +746,8 @@ class Model_Invoice extends ORM_OSB implements Cartable {
 	public function list_due($time=NULL,$authorised=TRUE) {
 		$result = array();
 
-		if (is_null($time))
-			$time = time();
-
 		foreach ($this->_list_due($authorised) as $io)
-			if ($io->due_date > $time)
+			if (is_null($time) OR $io->due_date > $time)
 				array_push($result,$io);
 
 		return $result;