Werk #3626: dell_eql_storage: fixed scan function if sysDescr is empty

Component	Checks & agents
Title	dell_eql_storage: fixed scan function if sysDescr is empty
Date	May 30, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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