CI 1.7: mysqli error when using empty port

[eluser]thespy[/eluser]
same problem here after updating from 1.6.3 to 1.7 :

ERROR - 2008-10-24 16:20:37 --> Severity: Warning --> mysqli_connect() expects parameter 5 to be long, string given /home/site.com/codeigniter_system/database/drivers/mysqli/mysqli_driver.php 63
ERROR - 2008-10-24 16:20:37 --> Unable to connect to the database

And problem fixed with remove the "port" parameter in mysqli_driver.php