error on `len` when ndarray size==0, error on `','.join` when size == 1

[WillForan]

in ICA_AROMA_functions.py

len(motionICs) >0
len(denIdx) > 0

throws

TypeError: len() of unsized object

when array is empty. And

 txt.write(','.join(['%.0f' % num for num in (motionICs+1)]))
 #and 
','.join(denIdxStr) + 1

throws

TypeError: can only join an iterable

when array.size == 1

I'm on debian jessie:

python -V; python -c 'import numpy; print("numpy: " + numpy.__version__)'

Python 2.7.9
numpy: 1.12.1