Delete duplicated PREFETCHR0 line.
Delete duplicated PREFETCHR0 line.

vapoursynth/vapoursynth,vapoursynth/vapoursynth,vapoursynth/vapoursynth,vapoursynth/vapoursynth,Kamekameha/vapoursynth,Kamekameha/vapoursynth,Kamekameha/vapoursynth,Kamekameha/vapoursynth