Werk #11100: veeam_tapejobs: Fix crash upon deprecation warning

Component	Checks & agents
Title	veeam_tapejobs: Fix crash upon deprecation warning
Date	May 4, 2020
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0p12 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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