fix a py2 compat issue in neonatal_cortex.py#11

jcupitt wants to merge 1 commit intoMIRTK:masterMIRTK/Deformable:masterfrom

jcupitt:fix-py2-neonatal_cortex.pyjcupitt/Deformable:fix-py2-neonatal_cortex.pyCopy head branch name to clipboard