[3.12] gh-126594: Fix typeobject.c wrap_buffer() cast (GH-126754) (#127005)

gh-126594: Fix typeobject.c wrap_buffer() cast (GH-126754)

Reject flags smaller than INT_MIN.

(cherry picked from commit 84f07c3a4cbcfe488ccfb4030571be0bc4de7e45)

Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>