Werk #4678: Availability reports: Fixed possible exception when working with empty data

Component	Reporting & availability
Title	Availability reports: Fixed possible exception when working with empty data
Date	May 11, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Not yet released Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0b7 Checkmk Enterprise (CEE), Checkmk MSP (CME)

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