gh-90071: Stop freeing data which was never allocated

[DarthGandalf]

• Issue: readline + GTK + Pytest Seg Fault with Python 3.7 and 3.10 on CI #90071

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[carljm]

As I just commented on the issue, I don't see any evidence this is a bug in Python. Python is using the readline API correctly, and correctly ensuring that any history entry it frees is fully freed. If some other software is causing a history entry to have a garbage data pointer, the bug is in that package, not in Python.

[carljm]

Reopening based on discussion in issue. Still not sure it's really accurate to call this a bug in Python, but it does seem like the change is harmless and would avoid crashing in some edge cases when a broken version of readline is loaded by an extension module.

[github-actions]

This PR is stale because it has been open for 30 days with no activity.

[DarthGandalf]

Well, ping? :)