BindParam: fixed bug with param call by reference

extension/qfq/qfq/helper/BindParam.php

@@ -14,7 +14,7 @@ class BindParam {
     private $values = array(), $types = '';
 
     public function add(&$value) {
-        $this->values[] = $value;
+        $this->values[] = &$value;
         $this->types .= $this->getParameterBindType($value);
     }