From e1ceb050e19c7574bca146a8da7047ee4ff456b5 Mon Sep 17 00:00:00 2001
From: Marius Burkard <m.burkard@pixcept.de>
Date: Sun, 10 Jul 2016 05:02:35 -0400
Subject: [PATCH] Merge branch 'stable-3.1'

---
 interface/lib/classes/listform.inc.php |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/interface/lib/classes/listform.inc.php b/interface/lib/classes/listform.inc.php
index 120e652..af6c3ff 100644
--- a/interface/lib/classes/listform.inc.php
+++ b/interface/lib/classes/listform.inc.php
@@ -563,7 +563,7 @@
 					break;
 
 				case 'DATE':
-					if($record[$key] != '' && $record[$key] != '0000-00-00') {
+					if($record[$key] != '' && !is_null($record[$key]) && $record[$key] != '0000-00-00') {
 						$record[$key] = $record[$key];
 					}
 					break;

--
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