False positive py/uninitialized-local-variable

**Description of the false positive**

**Code samples or links to source code**

```python
class Foo:
def foo(self, a, b, c=0):
start = 0
visible = not (a == b and c)
end = start if visible else None
return end

```

CodeQL Version: 2.18.3

Alert : Local variable 'visible' may be used before it is initialized.

I suspect that the issue is caused by EssaVariable being unable to locate the assignment statement for the variable visible, but I'm not sure how to modify the ql statement.

根据提供的 Python 示例，检查 py/uninitialized-local-variable 查询及其对 EssaVariable 的处理。确认对于此代码，关于 visible 的错误警报不再出现，同时预期的未初始化局部变量检测仍保持完整。

由索引模型根据 Issue 内容生成。