fix small problem in utils
fix small problem in utils

smerdis/pycortex,CVML/pycortex,gallantlab/pycortex,gallantlab/pycortex,gallantlab/pycortex,CVML/pycortex,smerdis/pycortex,smerdis/pycortex,gallantlab/pycortex,CVML/pycortex,CVML/pycortex,smerdis/pycortex,smerdis/pycortex,CVML/pycortex,gallantlab/pycortex