doctrine/common — pull request #210 by rnijveld (2012-10-27 23:15:56+00:00)
Title: MappingDriverChain::getAllClassNames should load all classes from the defaultDriver

I actually tried working around this by adding a driver using an empty string as the namespace, only to find out that `strpos()` doesn't accept an empty delimiter.

Anyway, this makes sure that all loadable classes for the defaultDriver are actually returned by MappingDriverChain as well.