message: build: eliminate c++17 Python build warning
diff: #if defined(_MSC_VER) && (_MSC_VER >= 1800)
  // eliminating duplicated round() declaration
  #define HAVE_ROUND 1
  +#pragma warning(push)
  +#pragma warning(disable:5033) // 'register' is no longer a supported storage class
  #endif
  -
  #include <Python.h>
  +#if defined(_MSC_VER) && (_MSC_VER >= 1800)
  +#pragma warning(pop)
  +#endif
  #define MODULESTR "cv2"
  #define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
  