metomi/isodatetime — pull request #28 by benfitzpatrick (2014-03-26 12:21:05+00:00)
Title: Fix get next point for single-repetition recurrences

This fixes the case where a recurrence has a single repetition
(i.e. a null interval) and the `get_next` method is called.

@arjclark, please review.

Tests pass.