BUG: register_multimodal: fixed bug when using ANTS3d with translation
BUG: register_multimodal: fixed bug when using ANTS3d with translation

Former-commit-id: 272ac5fedfb66e4317950735fd5f523c0a276b1c [formerly b2c0523dbc96a9ea88164c24ec37fa2e4ecbc2f8]
Former-commit-id: f2cc393738f0fd7b17a9a9e6440243e19a525bfd
Former-commit-id: ce1c437280ec24ace4097f7faa85927528979c66
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox