core: fix percentile approximation #1715
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In Netflix#1704 the approximation was updated to use doubles instead of longs. As part of that non-finite values were ignored. Before they would be treated as 0. By ignoring them a bad value could potentially be carried forward if it only occurred for a single interval.
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In #1704 the approximation was updated to use doubles instead of longs. As part of that non-finite values were ignored. Before they would be treated as 0. By ignoring them a bad value could potentially be carried forward if it only occurred for a single interval.