Improves the error message if LCALIF's normalizeInputFlag is set but nothing is on the normalizing channel.
Improves the error message if LCALIF's normalizeInputFlag is set but nothing is on the normalizing channel.

git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@6432 7c0444ca-5550-0410-9008-faecdbe78eb5

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