Add round_to_multiple_of_pow2 to fmath
Add round_to_multiple_of_pow2 to fmath

scott-wilson/oiio,cwilling/oiio,OpenImageIO/oiio,lgritz/oiio,bdeluca/oiio,lgritz/oiio,lgritz/oiio,bdeluca/oiio,sambler/oiio,OpenImageIO/oiio,micler/oiio,sambler/oiio,mcanthony/oiio,cwilling/oiio,scott-wilson/oiio,scott-wilson/oiio,mcanthony/oiio,lgritz/oiio,micler/oiio,YangYangTL/oiio,scott-wilson/oiio,sambler/oiio,micler/oiio,OpenImageIO/oiio,bdeluca/oiio,sambler/oiio,YangYangTL/oiio,OpenImageIO/oiio,micler/oiio,bdeluca/oiio,YangYangTL/oiio,YangYangTL/oiio,mcanthony/oiio,cwilling/oiio,cwilling/oiio,mcanthony/oiio