BUG: crop_image: fixed bug
BUG: crop_image: fixed bug

Former-commit-id: 2a2606e6ccc1c529fbcaf6b33f365cac64d806f6 [formerly f562093cdee5f4c078e1b27e01df27db123b8fc7]
Former-commit-id: 1e6e2f176364335227a548d881a48c54d28c6ce6
Former-commit-id: 13a133da986b506691a5f88d72a019a0d604594b
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox