Werk #3060: Folder properties: Fixed exception when a user has no alias set

Component	Setup
Title	Folder properties: Fixed exception when a user has no alias set
Date	Feb 15, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.2.8b2 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The "Network Scan" property caused the page to break when at least one user had no alias set.

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