fix cuda build under r3849918
cd ~/arcadia/strm/cv/ffmpeg_adcv
ya make -rj 16 -DCUDA_VERSION=8.0
#define Y_UNUSED(var) (void)(var)
#endif
#if !defined(Y_UNUSED) && defined(__cplusplus)
-template <class ... Types> constexpr Y_FORCE_INLINE void Y_UNUSED(Types&&...){};
+template <class ... Types> constexpr Y_FORCE_INLINE int Y_UNUSED(Types&&...){return 0;};
#endif
/**
