From a369690e16f1e5edefc4b1dcc208111711b6bce6 Mon Sep 17 00:00:00 2001
From: Laurent Destailleur <eldy@destailleur.fr>
Date: Tue, 31 Dec 2019 17:07:56 +0100
Subject: [PATCH] Update commoninvoice.class.php

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

diff --git a/htdocs/core/class/commoninvoice.class.php b/htdocs/core/class/commoninvoice.class.php
index 94efdea4d3e..531bf1a09ad 100644
--- a/htdocs/core/class/commoninvoice.class.php
+++ b/htdocs/core/class/commoninvoice.class.php
@@ -338,7 +338,7 @@ abstract class CommonInvoice extends CommonObject
 			}
 
 			//look for credit notes and discounts and deposits
-			$sql = 0;
+			$sql = '';
 			if ($this->element == 'facture' || $this->element == 'invoice')
 			{
 				$sql = 'SELECT rc.amount_ttc as amount, rc.multicurrency_amount_ttc as multicurrency_amount, rc.datec as date, f.ref as ref, rc.description as type';