[clang] [clang] fix use after free in clang/tools/c-index-test/c-index-test.c (PR #127063)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

> @metaflow @vitalybuka I've checked in [8f41d28](https://github.com/llvm/llvm-project/commit/8f41d28d89ee287d0f5a6518116ab316be2657b8) to fix warnings. Thanks!

Thank You!

https://github.com/llvm/llvm-project/pull/127063