Werk #4282: Fixed rendering of perfometers when no RRDs exist yet

Component	User interface
Title	Fixed rendering of perfometers when no RRDs exist yet
Date	Jan 19, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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