fixed vector demoting issue in dmnorm conjugate sampler
fixed vector demoting issue in dmnorm conjugate sampler

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