Werk #158: dell_om_disks: Handle hotspares more correctly

Component	Checks & agents
Title	dell_om_disks: Handle hotspares more correctly
Date	Apr 30, 2014
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.5i3 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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