using ISNAN in Utils.cpp to address Windows building issue on R 3.3.0 (devel)
using ISNAN in Utils.cpp
to address Windows building issue on R 3.3.0 (devel)

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