BUG: fixes issue #1037 related to a surplus transformation from physical to voxel space.
BUG: fixes issue #1037 related to a surplus transformation from physical to voxel space.

Former-commit-id: 6e1e385e71ec2ca847ff50b01ced8ebdf19c8cad
Former-commit-id: c0282e78dafeca485ee17e71ab20cd64c4878b2a
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox