nanshe/expanded_numpy.py: Added an assertion to expanded_numpy.norm to ensure it has some dimensions.
nanshe/expanded_numpy.py: Added an assertion to expanded_numpy.norm to ensure it has some dimensions.

DudLab/nanshe,DudLab/nanshe,nanshe-org/nanshe,jakirkham/nanshe,jakirkham/nanshe,nanshe-org/nanshe