BUG: create_mask: temp fix
BUG: create_mask: temp fix

Former-commit-id: e095b25141e856b2275c12ee4ad39e7be8c930a4 [formerly f4931d26fafc1fa1572721c125db9eb46a2331ed]
Former-commit-id: 7c71bab2b9a1c123ec567842b36f322ff2461592
Former-commit-id: c56665cf3cbfc8db0b96aea4f10945dc11d579d3
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox