Werk #4716: Fixed broken config when selecing "empty" icon as host/service icon image

Component Core & setup
Title Fixed broken config when selecing "empty" icon as host/service icon image
Date May 16, 2017
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.4.0b8 1.5.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

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