simd: Add length(), length2() to vfloat3 to match Imath (#2452)
simd: Add length(), length2() to vfloat3 to match Imath (#2452)


lgritz/oiio,OpenImageIO/oiio,OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio