Werk #6221: emc_datadomain_disks: Fix crash caused by missing busy data

Component	Checks & agents
Title	emc_datadomain_disks: Fix crash caused by missing busy data
Date	Jun 7, 2018
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0b7 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.4.0p34 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Some devices do not report busy stats for disks via SNMP. Previously, the check would crash, thus shadowing the status monitoring. This has been fixed.

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