message: Fix typo in FastTensorDType() helper in pywrap_tfe_src.cc (testing wrong variable against nullptr)
diff: @@ -1118,7 +1118,7 @@ static tensorflow::DataType FastTensorDtype(PyObject* tensor) {
  }
  PyObject* enum_field = PyObject_GetAttrString(dtype_field, "_type_enum");
  Py_DECREF(dtype_field);
  - if (dtype_field == nullptr) {
  + if (enum_field == nullptr) {
  return tensorflow::DT_INVALID;
  }
  tensorflow::int64 id = MakeInt(enum_field);
  