OPT: interpolate manual gmseg with nearest neighbour (binary)
OPT: interpolate manual gmseg with nearest neighbour (binary)

Former-commit-id: c9e8033e6b2d549a91b4c9bc1ab6d32a71b4f8b5
Former-commit-id: 2d3b646f89ab855536f033ebb79a95c5229de01c
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox