[clang] [clang-format] Fix crashes in AlignArrayOfStructures (PR #72520)

[Owen Pan via cfe-commits]

owenca wrote:

> > Thanks for trying it on 17.x. We can't backport it then.
> 
> Any idea if there is another workaround or fix that we could do to target 17.x? 18 is still pretty far off and clang-format for 17 will soon be included in a lot of downstream tools. Happy to help out fixing it if you have any pointers.

My bad. #72628 was already "fixed" on 18 before this patch. Can you help bisect it?

https://github.com/llvm/llvm-project/pull/72520