[3.9] gh-98793: Fix typecheck in `overlapped.c` (GH-98835) (GH-98890) (GH-140825)

(cherry picked from commit d3d1738acd4f62869d7f1e119c257e2ee46fd16f)

Co-authored-by: Charlie Zhao <zhaoyu_hit@qq.com>
Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Petr Viktorin <encukou@gmail.com>