Werk #6712: Fixed TypeError exception when running "cmk -D" on hosts without IP address

Component	Core & setup
Title	Fixed TypeError exception when running "cmk -D" on hosts without IP address
Date	Sep 24, 2018
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0p5 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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