Werk #3365: Cleaned up wrong counting of parents when renaming a host

Component	Setup
Title	Cleaned up wrong counting of parents when renaming a host
Date	Apr 6, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.2.8b10 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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