... rather than []
If a table exists, you can treat the output of `find` as an iterator,
specifically you can call `next(find(...))`:
```
>>> db = dataset.connect('sqlite:///:memory1:')
>>> table = db['table_which_exists']
>>> table.insert({'foo': 'x'})
>>> next(table.find(foo='x')) # no problem
```
But if the table hasn't been created yet, `find(...)` returns an empty list,
which you can't call `next()` on:
```
>>> db = dataset.connect('sqlite:///:memory2:')
>>> table = db_no_table['table_which_doesnt_exis']
>>> next(table.find(foo='x'))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'list' object is not an iterator
```
^^^ rather than a `TypeError`, I'd expect to get a `StopIteration`
exception.
Paul M Furley