Fix zero-type of logjac for ReshapeTransform#851

mhauru merged 5 commits intomainTuringLang/DynamicPPL.jl:mainfrom

mhauru/reshapetransform-jac-eltypeTuringLang/DynamicPPL.jl:mhauru/reshapetransform-jac-eltypeCopy head branch name to clipboard