[3.9] bpo-40714: Remove compile warning from _zoneinfo.c (GH-20291) (GH-20293)



(cherry picked from commit a487a39dca4c41305928c7dfdbcb0b3aa344683b)


Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>

Automerge-Triggered-By: @corona10
1 file changed