Blender Git Loki

Fix T72289: FreeStyle python error

Introduced by {T67981}. We changed the python API for curve evaluation.
Freestyle still used the old call that failed. This patch updates
FreeStyle to use the new API. I checked other areas in freestyle but it
seemed to be the only `evaluate` for curves that is called directly.

Reviewed By: zeddb

Differential Revision: https://developer.blender.org/D6430