BUG: msct_smooth: fixed issue related to window size (issue #390)
BUG: msct_smooth: fixed issue related to window size (issue #390)

Former-commit-id: 1aaee6c72d79770a25e6238029d55e6901ac7808
Former-commit-id: e04dd87f5e8145fbc59d0ead06378ffca8945918
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox