Consider cleanup of type for iterator variables bounded by asdl_seq_LEN

Feature or enhancement

It looks like the asdl_seq_LEN macro's "return type" is Py_ssize_t. Throughout the code, the type of the variable compared against a value "returned" by the macro are variously

int or
Py_ssize_t

Pitch

I am not sure, but it seems like it would be good to be consistent throughout the code base. If this is something that seems reasonable or valuable, I would be happy to take on the task!

Previous discussion

No previous discussion, however I searched prior issues and see nothing noting something similar.

まず、asdl_seq_LEN マクロを見つけ、その結果とイテレータ変数を比較している使用箇所を確認します。int または Py_ssize_t 型の影響を受ける変数を特定し、コードベース全体で型を一貫させた後、関連する既存のテストを確認します。