Werk #1922: Fix exception in saving of hosttags if hosttag has at least one auxiliary tag

Component	Setup
Title	Fix exception in saving of hosttags if hosttag has at least one auxiliary tag
Date	Jan 30, 2015
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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