[clang] [clang][analyzer] CallAndMessage warnings at pointer to uninitialized struct (PR #164600)

[Balázs Kéri via cfe-commits]

balazske wrote:

There are more FIXME comments (in test files) about that it is not possible to read undefined values from a `LazyCompoundVal`, instead these will be unknown values. Probably this is the same problem here. To have a good solution this issue should be fixed, but it needs again more investigation why it works this way or how difficult is it to improve.

https://github.com/llvm/llvm-project/pull/164600