Werk #739: Availablity: Prevent crash if the notification period is missing

Component Core & Setup
Title Availablity: Prevent crash if the notification period is missing
Date Mar 28, 2014
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 1.2.5i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

There are some setup where the notification period of a nagios object was set to NULL.

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