Fixed PHP warning when no IDN filters are set for field in lists.

Till Brehm

2015-11-14 cc636e1a8ed430f060766e22cbdfeaa8de4afbc3

 interface/lib/classes/listform.inc.php

@@ -199,6 +199,7 @@
            $searchval = $_SESSION['search'][$list_name][$search_prefix.$field];
            // IDN
            if($searchval != ''){
               if(is_array($i['filters'])) {
               foreach($i['filters'] as $searchval_filter) {
                  if($searchval_filter['event'] == 'SHOW') {
                     switch ($searchval_filter['type']) {
@@ -210,6 +211,7 @@
                  }
               }
            }
            }
      
            // format user date format to MySQL date format 0000-00-00
            if($i['datatype'] == 'DATE' && $this->lng('conf_format_dateshort') != 'Y-m-d'){