sct_qc: py3k fix
sct_qc: py3k fix


Former-commit-id: 9b99caf29644b1ff0e3f3da785ec5518ca763150
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox