Reset to array instead of null

Author: Rick Kuipers

app/code/community/EcomDev/PHPUnit/Controller/Request/Http.php

@@ -158,7 +158,7 @@ public function resetInternalProperties()
         // From Http request
         $this->_paramSources = array('_GET', '_POST');
         $this->_requestUri = null;
-        $this->_params = null;
+        $this->_params = array();
         $this->_baseUrl = null;
         $this->_basePath = null;
         $this->_pathInfo = '';