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: 83cbbd9071e826ad6b8abab3e7bbf0cfecc01527 [formerly 6e1e385e71ec2ca847ff50b01ced8ebdf19c8cad]
Former-commit-id: c0282e78dafeca485ee17e71ab20cd64c4878b2a
Former-commit-id: b5d884bcedb1a45f1717d0c6e7b30e6a68d17bb6
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox