Werk #7982: Fix "N/A" being displayed in some host tag columns

Component User interface
Title Fix "N/A" being displayed in some host tag columns
Date Jul 18, 2019
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.6.0b4 2.0.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

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