BUG: fix discrepancy between CSA results displayed in terminal window and those written in csa_volume.nii.gz (due to data type recorded in header)
BUG: fix discrepancy between CSA results displayed in terminal window and those written in csa_volume.nii.gz (due to data type recorded in header)

Former-commit-id: 4ae8eba21c89e9cc0ffccae3f92f727951401004 [formerly 2cfa57e262a8186dda951d097f3c70bdd7e47727]
Former-commit-id: b44aa1284ed04af1d08afc107bca33e42c593ea3
Former-commit-id: 78ed55193d53600b2f5253d6fbbfc38df51e9a67
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox