zencart/zc-v1-series — pull request #42 by robryanx (2014-03-25 03:18:07+00:00)
Title: Updated admin zen_not_null to bring it in line with the non admin function

The primary concern with the admin one was zen_not_null(true) === false
The website one correctly does zen_not_null(true) === true
An explicit check for boolean could also be added but I guess it doesn't need it.