reduce nurbs_pts_number
reduce nurbs_pts_number


Former-commit-id: 983a71988d6741998a226452b35d58115976b527
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox