Fixes #398 Loading language as datahandler is bugged.

I see my commit to the feature branch wasn't reverted though the one to the master branch was.
https://github.com/mybb/mybb/commits/feature/inc/class_language.php

"Fixes #2098 Loading language as datahandler is bugged."

If this is not the proper procedure for PR please explain. Trying to get used to it :)