message: fix CvFp16Test failure
diff: @@ -288,7 +288,7 @@ template <> __device__ __forceinline__ short cast_fp16<float, short>(float v)
  {
  #if __CUDACC_VER_MAJOR__ >= 9
  __half h(v);
  - return *(short*)&v;
  + return *(short*)&h;
  #else
  return (short)__float2half_rn(v);
  #endif
  