[clang] [Clang] Fix 'counted_by' for nested struct pointers (PR #110497)

[Jan Hendrik Farr via cfe-commits]

Cydox wrote:

Yeah so the problem is if you do `__builtin_dynamic_object_size(v, 0)`

In that case it's a `DeclRefExpr`, a pointer, and an `LValue`.

Easy fix is to check if `StructBase` is a pointer instead of checking for LValue, but then I don't really see the point of this change vs my originial PR to be honest (maybe I'm missing something).

https://github.com/llvm/llvm-project/pull/110497