Werk #8537: Fixed possible exception when deleting a host via WATO

Component	Setup
Title	Fixed possible exception when deleting a host via WATO
Date	Jul 21, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Pro, Checkmk Ultimate MT

This could happen when the agent bakerys agent directory is not existant.

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