mapbox/mapbox-gl-js — pull request #867 by michaelsteffen (2014-12-06 21:20:49+00:00)
Title: Fix zero-duration transitions

Currently, zero-duration transitions are broken. Example [here](http://bl.ocks.org/michaelsteffen/297c394eed7baa2ec370), based on the Mapbox demo (note the default 300 ms transition between styles that shouldn't exist). This fixes them.