Get rid of un-needed float-specific defines around yuv support. Remove unintended support for rgb to yuv conversion. We only support yuv to rgb conversion.
EXPORTS ?New@CDirectGdiDriverInternal@@SAHAAPAV1@VRLibrary@@@Z @ 1 NONAME ; int CDirectGdiDriverInternal::New(class CDirectGdiDriverInternal * &, class RLibrary)