facebook/php-sdk — pull request #505 by Fizzadar (2011-12-04 12:10:09+00:00)
Title: Require base_ from the same directory as facebook.php

Seeing as the crt bundle is included in a similar way; I thought the base class should also be included from the same directory.

This also means for apps which use an auto-class loader will work (i.e they load facebook and it doesn't include base without this change).