I've fixed a few warnings that pop up on VC14. NB the code gives lots of significant numerical diffs on VC14 (both x64 and win32). Windows really needs a few Travis jobs
I've fixed a few warnings that pop up on VC14. NB the code gives lots of significant numerical diffs on VC14 (both x64 and win32). Windows really needs a few Travis jobs

xtensor-stack/xtensor-fftw,egpbos/xtensor-fftw,egpbos/xtensor-fftw,xtensor-stack/xtensor-fftw