BUG: fix issue #813
BUG: fix issue #813

Former-commit-id: 98bb0c978781681fdcb730e24b5f55f3a14fd003 [formerly f1deca68287e92eee67ebdec6dda3aa1523bac10]
Former-commit-id: f51a7680337cae882840d9d6e4854824658d4df2
Former-commit-id: 34119bab44823e22437a025904f9621daf47198c
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox