Werk #3049: esx_vsphere_hostsystem.mem_usage_cluster: Fixed exception when no thresholds configured

Component	Checks & agents
Title	esx_vsphere_hostsystem.mem_usage_cluster: Fixed exception when no thresholds configured
Date	Feb 11, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.2.8b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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