bpo-35714: Reject null characters in struct format strings (GH-16928)


struct.error is now raised if there is a null character in a struct
format string.
(cherry picked from commit 3f59b55316f4c6ab451997902579aa69020b537c)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
3 files changed