Werk #8830: MSSQL checks: Do not crash if line contains invalid data

Component	Checks & agents
Title	MSSQL checks: Do not crash if line contains invalid data
Date	Aug 20, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0b7 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0p22 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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