Problem compiling luminancehdr on mac OS X 12

[HIRAM (Richard E Barber)]

After convincing findfftw to find fftw per MacOSX build of Luminance_HDR_2.5.1 - #16 by clanmills the build did succeed without the warnings.
https://filebin.net/2djmoa4x4sf6r6nc/Luminance_HDR_2.5.1.dmg