message: fix array symbol Py_IncRef on value
diff: @@ -67,6 +67,7 @@ PyObject * Symbol::toJson() const {
  case symb_ARRAY:
  assert(value_arr);
  val = PyList_New(value_arr->size());
  + Py_IncRef(val);
  for (auto symb : *value_arr) {
  PyList_SetItem(val, indx, symb.toJson());
  indx++;
  