Werk #11904: Fix TypeError in docker_container_diskstat check

Component Checks & Agents
Title Fix TypeError in docker_container_diskstat check
Date Feb 9, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0i1 2.0.0b7 1.6.0p21
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

This fixes the TypeError ('NoneType' object is not iterable) error in the docker_container_diskstat check.

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