Fix dropout bug, as noticed by Tolga
Fix dropout bug, as noticed by Tolga

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