Fixed warning.

Author: dorantor

src/Gwt/Client.php

@@ -85,6 +85,13 @@ class Gwt_Client
      */
     private $_auth = false;
 
+    /**
+     * List of processors
+     *
+     * @var array
+     */
+    private $_processors = array();
+
     /**
      * Constructor
      * It would be better to keep constructor free of any params