rackerlabs/api-checker — pull request #214 by shintasmith (2014-06-02 20:40:34+00:00)
Title: return empty iterator of string List to avoid NPE

If I have a WADL with <param>: style=header and I have a request using validator-base.scala's mock HttpRequest object without any request header, I would get an NPE:
https://gist.github.com/shintasmith/7018179d79b89ed4bdd0

This PR fixes that NPE.