tildeio/router.js — pull request #63 by ef4 (2013-11-26 22:54:53+00:00)
Title: Prevent exception when checking isActive on an intermediate route

This addresses https://github.com/emberjs/ember.js/issues/3810

The router's `isActive` expects `currentParams` to always be available, but that's not true if the first route we render is an intermediate transition.