From eb529187112ef5ab61bfbfdddd67314681fe9bb3 Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Fri, 20 May 2016 10:40:58 +0200
Subject: [PATCH] ExtensibleSet: do not array-filter when null

---
 library/Director/Web/Form/Element/ExtensibleSet.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/library/Director/Web/Form/Element/ExtensibleSet.php b/library/Director/Web/Form/Element/ExtensibleSet.php
index a5af245b..12f6134b 100644
--- a/library/Director/Web/Form/Element/ExtensibleSet.php
+++ b/library/Director/Web/Form/Element/ExtensibleSet.php
@@ -32,7 +32,9 @@ class ExtensibleSet extends FormElement
 
     protected function _filterValue(&$value, &$key)
     {
-        $value = array_filter($value, 'strlen');
+        if ($value !== null) {
+            $value = array_filter($value, 'strlen');
+        }
         return parent::_filterValue($value, $key);
     }