Merge branch 'stable-3.1' of git.ispconfig.org:ispconfig/ispconfig3 into st...

Till Brehm

2016-05-27 51a7b5e29a1cbf53e9858a6b11aa0be1f8fc59d2

 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;