warpcorrect: Fix comparison to marker#3364
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Using (vec-val).isMuchSmallerThan(precision) had two issues: firstly, the help string claimed that the precision term related to the L2 norm, but no such norm was computed; secondly, the input scalar to .isMuchSmallerThan() was treated as the scalar value to which to compare, to which a default precision multiplier was then applied. Comparison to zero with a precision tolerance is more consistent with intent.
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Using
(vec-val).isMuchSmallerThan(precision)had two issues: firstly, the help string claimed that the precision term related to the L2 norm, but no such norm was computed; secondly, the input scalar to.isMuchSmallerThan()was treated as the scalar value to which to compare, to which a default precision multiplier was then applied. Comparison to zero with a precision tolerance is more consistent with intent.Discovered while trying to process the same data set as that which exposed #3362.