added comment to emphasize that clayer->numNeurons refers to number of neurons in that PVLayerCube, not accross the entire layer
added comment to emphasize that clayer->numNeurons refers to number of neurons in
that PVLayerCube, not accross the entire layer

git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@1327 7c0444ca-5550-0410-9008-faecdbe78eb5

PetaVision/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV