ImageCache speedups -- remove pow2 roundups of autotile tile sizes. This was an artifact of an old restriction of TextureSystem which is no longer necessary.
ImageCache speedups -- remove pow2 roundups of autotile tile sizes.
This was an artifact of an old restriction of TextureSystem which is no
longer necessary.

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