message: Fix macro bug with v_reduce_min and v_reduce_max for chars in VSX
diff: @@ -764,10 +764,10 @@ inline scalartype v_reduce_##suffix(const _Tpvec& a)
  rs = func(rs, vec_sld(rs, rs, 2)); \
  return vec_extract(func(rs, vec_sld(rs, rs, 1)), 0); \
  }
  -OPENCV_HAL_IMPL_VSX_REDUCE_OP_8(v_uint8x16, vec_uchar16, uchar, max, vec_max)
  -OPENCV_HAL_IMPL_VSX_REDUCE_OP_8(v_uint8x16, vec_uchar16, uchar, min, vec_min)
  -OPENCV_HAL_IMPL_VSX_REDUCE_OP_8(v_int8x16, vec_char16, schar, max, vec_max)
  -OPENCV_HAL_IMPL_VSX_REDUCE_OP_8(v_int8x16, vec_char16, schar, min, vec_min)
  +OPENCV_HAL_IMPL_VSX_REDUCE_OP_16(v_uint8x16, vec_uchar16, uchar, max, vec_max)
  +OPENCV_HAL_IMPL_VSX_REDUCE_OP_16(v_uint8x16, vec_uchar16, uchar, min, vec_min)
  +OPENCV_HAL_IMPL_VSX_REDUCE_OP_16(v_int8x16, vec_char16, schar, max, vec_max)
  +OPENCV_HAL_IMPL_VSX_REDUCE_OP_16(v_int8x16, vec_char16, schar, min, vec_min)
  inline v_float32x4 v_reduce_sum4(const v_float32x4& a, const v_float32x4& b,
  const v_float32x4& c, const v_float32x4& d)
  