mitchellh/vagrant — pull request #857 by theju (2012-04-02 06:37:25+00:00)
Title: Fix for invalid type checking

Fix based on my comment at https://github.com/mitchellh/vagrant/commit/eb07788db19db5b29debb545eb5ff83f59ed74fe#lib/vagrant/driver/virtualbox_4_1.rb-P51