"'playhouse._speedups._ModelQueryResultWrapper' object has no attribute 'next'" with cython
Fixed.
 Thanks :)

With latest master, using cython, doing a `User.select().where(User.id == 1).get()`:

```
    def get(self):
        clone = self.paginate(1, 1)
        try:
>           return clone.execute().next()
E           AttributeError: 'playhouse._speedups._ModelQueryResultWrapper' object has no attribute 'next'
```

Does that ring a bell to you as is or should I investigate?
