Fixed array bounds checking for LUT interpolation
Fixed array bounds checking for LUT interpolation

Both luminance linear interpolation and chroma quadratic (bilinear) interp could access memory beyond the end of their LUTs,
which resulted in NaNs in unit tests. Fixed with a simple call to fmin.

TadLeonard/husl-numpy,TadLeonard/husl-numpy,TadLeonard/husl-numpy