Nonlocal test fails

This is b/c in

```python
def f():
    x = None
    y = None
    def g():
        nonlocal x, y
        x = 123
        y = 234
    return x, y
```

definitions of x come as `x = 123` and  `x = None` and we drop the outer one. PyCharm actually points to definition in `nonlocal x`. So we should figure out that `x` is `nonlocal` and either point to the `nonlocal` line or to `x = None`.