BUG: register_multimodal: fixed issue #807
BUG: register_multimodal: fixed issue #807

Former-commit-id: eb4dc85f739153d9c2b586f93a3c80c8622f0f8e
Former-commit-id: 59dc291191c86dba02b9d1324112663008f5b221
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox