Werk #4887: cisco_wlc: Fixed crashing check plugin caused by IndexError

Component	Checks & agents
Title	cisco_wlc: Fixed crashing check plugin caused by IndexError
Date	Jul 12, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.8p25 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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