Fix levelColor generation and its call for gauges (#2324) #2534
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Possible fix of #2324. Seems to be
arc.js:347
is the only line that does not checklevelColor
for emptiness before calling it. Moreover, we can removeconfig.color_pattern.length > 0
check and create non-nulllevelColor
function ifconfig.color_pattern
is not empty - otherwise undefined color that would be returned fromlevelColor
does not make much sense.