Werk #3339: Fixed exception on "Aggregations Affected by Service" page when no host/service given

Component	User interface
Title	Fixed exception on "Aggregations Affected by Service" page when no host/service given
Date	Mar 21, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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