Werk #13617: Fix crash during parsing of enviromux section

Component Checks & agents
Title Fix crash during parsing of enviromux section
Date Feb 23, 2022
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.0.0p21 2.2.0i1 2.1.0b1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

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