BUG: process_segmentation: fixed issue #395
BUG: process_segmentation: fixed issue #395

Former-commit-id: cce5254e2047afe06e9b1dafcb2db805ed19332b [formerly aa616faf6e6a0d69e5869b4ef2d0c589735135f5]
Former-commit-id: c646c177455aaa8b80e23ff233720d213b572477
Former-commit-id: ae53370aefb588ff7f30e4a3d93008fe30029e60
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox