python: fixed limited API build

modules/python/python3/CMakeLists.txt

@@ -7,6 +7,7 @@ if(PYTHON3_LIMITED_API
     AND NOT PYTHON3_NUMPY_VERSION VERSION_LESS "1.15"
     AND PYTHON3_NUMPY_VERSION VERSION_LESS "1.17"
   )
+  message(WARNING "Current NUMPY version (${PYTHON3_NUMPY_VERSION}) is not compatible with LIMITED_API.")
   set(PYTHON3_LIMITED_API OFF)
 endif()
 

modules/python/src2/cv2.cpp

@@ -1499,7 +1499,7 @@ convert_to_python_tuple(const std::tuple<Tp...>& cpp_tuple, PyObject* py_tuple)
     if (!item)
         return;
 
-    PyTuple_SET_ITEM(py_tuple, I, item);
+    PyTuple_SetItem(py_tuple, I, item);
     convert_to_python_tuple<I + 1, Tp...>(cpp_tuple, py_tuple);
 }