CodeIgniter 2.2.1 Released

Hi.
While I was busy updating my sites I got to a point were I was not sure if had already updated the system folder for one of the sites.

Went to check system\core\CodeIgniter.php
I found define('CI_VERSION', '2.2.0');
So I updated it.

Later I found out that the new 2.2.1 release does not have the equivalent information in:
system\core\CodeIgniter.php

It also has define('CI_VERSION', '2.2.0');
Just in case someone is wondering