Werk #2599: Fix newly introduced fatal bug preventing creation of new hosts in WATO

Component	Setup
Title	Fix newly introduced fatal bug preventing creation of new hosts in WATO
Date	Sep 21, 2015
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i3 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

This fixes the error message Invalid User Input, Please specify a hostname.

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