[3.13] gh-124248: Fix crash in struct when processing 0p fields (GH-124251) (#124277)

gh-124248: Fix crash in struct when processing 0p fields (GH-124251)
(cherry picked from commit 63f196090f90cbfe5f698824655f74dea5cb2b29)

Co-authored-by: Brian Schubert <brianm.schubert@gmail.com>
4 files changed