$sql = "SELECT sum(ov_freight) as freight FROM ".TB_PREF."debtor_trans WHERE order_ = $trans_no AND type = " . ST_CUSTDELIVERY . " AND debtor_no = " . $delivery->customer_id;
$result = db_query($sql, "Can not find delivery notes");
$row = db_fetch_row($result);
- if (!$row[0]) $freight = 0;
+ if (!is_array($row)) $freight = 0;
else $freight = $row[0];
if ($freight < $delivery->freight_cost) $delivery->freight_cost = $delivery->freight_cost - $freight;
else $delivery->freight_cost = 0;