Werk #3635: get_average: fixed overflow error

Component	Checks & agents
Title	get_average: fixed overflow error
Date	Jun 9, 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 1.2.8p5 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

To the list of all Werks