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.

根據提供的 Python 範例，檢查 py/uninitialized-local-variable 查詢及其對 EssaVariable 的處理。確認對於此程式碼，關於 visible 的錯誤警示不再出現，同時預期的未初始化區域變數偵測仍維持完整。

由索引模型根據 Issue 內容生成。