message: core: allow to disable including of unsupported/Eigen/CXX11/Tensor
  define OPENCV_DISABLE_EIGEN_TENSOR_SUPPORT
diff: #pragma warning( disable: 4244 ) //conversion from '__int64' to 'int', possible loss of data
  #endif
  +#if !defined(OPENCV_DISABLE_EIGEN_TENSOR_SUPPORT)
  #if EIGEN_WORLD_VERSION == 3 && EIGEN_MAJOR_VERSION >= 3 \
  && defined(CV_CXX11) && defined(CV_CXX_STD_ARRAY)
  #include <unsupported/Eigen/CXX11/Tensor>
  -#define OPENCV_EIGEN_TENSOR_SUPPORT
  +#define OPENCV_EIGEN_TENSOR_SUPPORT 1
  #endif // EIGEN_WORLD_VERSION == 3 && EIGEN_MAJOR_VERSION >= 3
  +#endif // !defined(OPENCV_DISABLE_EIGEN_TENSOR_SUPPORT)
  namespace cv
  {
  