Manage2 API for PHP (cpl-3.6) patch

Modifying any of the cpl-3.6 examples with:
$cpl->set_format("json");

Would result in the error:
PHP Notice: Undefined variable: format in cpl-3.6/php/cpl.inc.php on line 39

The following patch seems to address the error:

Code:

--- cpl-3.6/php/cpl.inc.php     2012-01-26 12:47:42.000000000 -0600
+++ cpl-3.6-mod/php/cpl.inc.php 2014-09-12 18:33:06.875875007 -0500
@@ -36,7 +36,7 @@
             return;
         }
         if ($this->format != "simplexml") {
-            $args['output'] = $format;
+            $args['output'] = $this->format;
         }
         $query = "https://manage2.cpanel.net/" . $function . "?" . http_build_query($args);
         curl_setopt($this->curl, CURLOPT_URL, $query);