From e2f5a302be15f3c1b608203d5d6054cd513c53e9 Mon Sep 17 00:00:00 2001
From: Laurent Destailleur <eldy@destailleur.fr>
Date: Sat, 7 Nov 2020 23:04:23 +0100
Subject: [PATCH] Fix warning

---
 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 892b93fb3e7..ef9e2aea07f 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -627,7 +627,7 @@ class Facture extends CommonInvoice
 		$sql .= ", ".($this->remise_absolue > 0 ? $this->remise_absolue : 'NULL');
 		$sql .= ", ".($this->remise_percent > 0 ? $this->remise_percent : 'NULL');
 		$sql .= ", '".$this->db->idate($this->date)."'";
-		$sql .= ", ".(strval($this->date_pointoftax) != '' ? "'".$this->db->idate($this->date_pointoftax)."'" : 'null');
+		$sql .= ", ".(empty($this->date_pointoftax) ? "null": "'".$this->db->idate($this->date_pointoftax)."'");
 		$sql .= ", ".($this->note_private ? "'".$this->db->escape($this->note_private)."'" : "null");
 		$sql .= ", ".($this->note_public ? "'".$this->db->escape($this->note_public)."'" : "null");
 		$sql .= ", ".($this->ref_client ? "'".$this->db->escape($this->ref_client)."'" : "null");