updated nimbleFunction_nodeFunction.R for trunc+
updated nimbleFunction_nodeFunction.R for trunc+

NLMichaud/nimble,NLMichaud/nimble,NLMichaud/nimble,nimble-dev/nimble,nimble-dev/nimble,nimble-dev/nimble,nxdao2000/nimble,nxdao2000/nimble,nxdao2000/nimble,NLMichaud/nimble,nimble-dev/nimble,nimble-dev/nimble,nxdao2000/nimble