The attribute was retrieved when converting to Bezier curves when it wasn't necessary. Instead copy it like a regular attribute if any of the result curves are NURBS. Also fix a check for an empty span for the attribute which was never false.
The attribute was retrieved when converting to Bezier curves when it wasn't necessary. Instead copy it like a regular attribute if any of the result curves are NURBS. Also fix a check for an empty span for the attribute which was never false.