From 83c38570e9d7deddfa8f05db3c0534c7b5f4d41a Mon Sep 17 00:00:00 2001
From: ATM-Marc <marc@atm-consulting.fr>
Date: Sun, 19 May 2019 01:01:21 +0200
Subject: [PATCH] FIX: invoice class: bad SQL request if product type not set

---
 htdocs/compta/facture/class/facture.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index d303e6edf21..2d78b95990f 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -4492,7 +4492,7 @@ class FactureLigne extends CommonInvoiceLine
 		$sql.= " '".$this->db->escape($this->localtax1_type)."',";
 		$sql.= " '".$this->db->escape($this->localtax2_type)."',";
 		$sql.= ' '.(! empty($this->fk_product)?$this->fk_product:"null").',';
-		$sql.= " ".$this->product_type.",";
+		$sql.= " '".$this->product_type."',";
 		$sql.= " ".price2num($this->remise_percent).",";
 		$sql.= " ".price2num($this->subprice).",";
 		$sql.= ' '.(! empty($this->fk_remise_except)?$this->fk_remise_except:"null").',';