Patch module prototype with null checking

[Ólafur Sverrir Kjartansson]

Seen a few issues with null checking while using this module so I wrote a monkey-patcher for the prototype while we wait for the next version:

https://gist.github.com/osk/1a469b0f25865d33692b059f15d3eeb3

Hope it helps someone!

[Matt]

This is great @osk :) thanks!