BUG: Fix pocketfft umath strides for AIX compatibility (#29768) by charris · Pull Request #29797 · numpy/numpy

* _pocketfft_umath.cpp: fix types

Fixes: numpy#29758
Credits to @seberg

* _pocketfft_umath.cpp: fix unused variable warning

* Move npts_in calculation into #ifndef

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Co-authored-by: Sebastian Berg <sebastianb@nvidia.com>