sensu/sensu — pull request #532 by nstielau (2013-05-14 15:59:45+00:00)
Title: Updating check validation for unpublished checks.

Unpublished checks (configured with the 'publish' attribute as false) are not scheduled to run on any interval. Hence, these checks do not require a valid interval to run. This change updates the check validation to take this into consideration.