BUG: msct_register: fixed issues with verbose=2
BUG: msct_register: fixed issues with verbose=2

Former-commit-id: 1cdff431268ffe2e62945f93bc113e1fe47b87cf
Former-commit-id: 911124ffe210d32d439f52795585b51f38b53d09
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox