Netflix/PigPen — pull request #37 by mbossenbroek (2014-06-17 21:33:24+00:00)
Title: Fix reducing empty seq

Fixes #35

An empty sequence as input to a reduce, fold, or into operation would throw an NPE. In addition to fixing this, I found that this edge case didn't match Pig's behavior, so I updated accordingly. See #35 for more details.