wvanbergen/adyen — pull request #57 by pjg (2012-11-05 18:10:42+00:00)
Title: Fix API #references call with empty recurring contracts

Previously, if you had no recurring contrancts and you executed a
`references` method to list IDs of those contracts, you would get this
error:

NoMethodError: undefined method `map' for nil:NilClass`

This fixes that, so you'll get an empty list instead.