message: Fixed a compilation error in UE-4.17
diff: @@ -228,7 +228,7 @@ PyObject *py_unreal_engine_editor_play(PyObject * self, PyObject * args) {
  }
  #if ENGINE_MINOR_VERSION >= 17
  - const FString mobile_device;
  + const FString mobile_device = FString("");
  GEditor->RequestPlaySession(&v, &r, false, false, mobile_device);
  #else
  GEditor->RequestPlaySession(&v, &r, false, false);
  