fixed faulty param for tauThr
fixed faulty param for tauThr

git-svn-id: http://svn.code.sf.net/p/petavision/code/sandbox@6324 7c0444ca-5550-0410-9008-faecdbe78eb5

Former-commit-id: f1cd84652050d5cf33d974ca655bcd8ceae79806
dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV