TribeHR/ad_hoc_reporting — pull request #25 by ianring (2014-07-16 20:14:14+00:00)
Title: allow zero in filter value [WEB-5096]

This was a little nugget of low-hanging fruit for a late afternoon at the slack-end of an iteration.
Ad Hoc report filters didn't allow a zero, because it was using empty() to detect blankness.

It's explained pretty well in the Jira ticket.
https://tribehr.atlassian.net/browse/WEB-5096