OPT: correctly take param -normalization into account
OPT: correctly take param -normalization into account

Former-commit-id: e9825f90f220b287489b55ff6b476e387a10f909
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox