Werk #15401: HW/SW Inventory: Fix crash if an attribute contains a list of values

Component	HW/SW inventory
Title	HW/SW Inventory: Fix crash if an attribute contains a list of values
Date	Jun 12, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p30 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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