Werk #8322: fixed: graph lines were always black

Component	Metrics system
Title	fixed: graph lines were always black
Date	Sep 16, 2015
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i3 Checkmk Enterprise (CEE), Checkmk MSP (CME)

due to a bug, lines in performance graphs drawn with the new graphing system were always black.

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