### Is this a bug in QuadraticForm?

```
QuadraticForm(ZZ, 2, [3, 2, 0]).lll()
```

gives a ValueError: a matrix from Full MatrixSpace of 2 by 1 dense matrices over
Integer Ring cannot be converted to a matrix in Full MatrixSpace of 2 by
2 dense matrices over Integer Ring!

Is this a bug or am I missing some precondition?