Ed Bartosh

Just a guess. Can it be caused by [this issue](https://github.com/bartosh/backtrader/issues/19)?

> Does that make sense to modify this code like that ? Yes, it makes sense. Please, submit PR. I'll be happy to accept it.

It's a bug that has to be fixed. The getposition method should return position object. I'll fix it when I have time. You can fix it too :)