TEST: straighten_spinalcord: status as int, added status=1 if crashes
TEST: straighten_spinalcord: status as int, added status=1 if crashes

Former-commit-id: dbf3942c5f509ead3a6d0404b9bd83475e00d0cb [formerly 3eeeccf718d75755dae2a6ecff8a564d6dc32cf7]
Former-commit-id: 79d089982fd525e76cbfe54b08f3c4cb8c66412c
Former-commit-id: 7f07d462f48f1074d301ac43ab324ed64329d108
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox