When searching for really close points, require that any candidate is coincident with the previous point.
When searching for really close points, require that any candidate is coincident with the previous point.

Due to the way that getNearbyVals() works, it's possible that it can return points that are
further away than the search radius. That would not be a problem except that it
is inconsistent and so it can return distant points while not returning others that
are actually closer.

Also remove another superfluous line size check.

Ultimaker/CuraEngine,Ultimaker/CuraEngine