Merge pull request zendframework/zendframework#2104 from marc-mabe/pa…

…tch-1

Wddx: libxml_disable_entity_loader(true) needs to be reset with previous value

src/Adapter/Wddx.php

@@ -114,9 +114,9 @@ public function unserialize($wddx)
             // check if the returned NULL is valid
             // or based on an invalid wddx string
             try {
-                libxml_disable_entity_loader(true);
+                $oldLibxmlDisableEntityLoader = libxml_disable_entity_loader(true);
                 $simpleXml = new \SimpleXMLElement($wddx);
-                libxml_disable_entity_loader(false);
+                libxml_disable_entity_loader($oldLibxmlDisableEntityLoader);
                 if (isset($simpleXml->data[0]->null[0])) {
                     return null; // valid null
                 }