Werk #4403: Fixed problem on diagnose page for distributed hosts

Component	Setup
Title	Fixed problem on diagnose page for distributed hosts
Date	Feb 28, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.4.0b4 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

An error "KeyError: '_state' could be shown in the "Ping" state container of the host diagnose page.

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