Werk #4521: mssql_versions: Fixed IndexError during inventory

Component	HW/SW inventory
Title	mssql_versions: Fixed IndexError during inventory
Date	Mar 13, 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

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