[clang] Fix evaluation of the unsigned enumeration values, #108766 (PR #108769)

[Jannick Kremer via cfe-commits]

https://github.com/DeinAlptraum commented:

Thanks a lot for the fix!

Except for the syntax error noted by the CI and my other comment, this looks good to me.

https://github.com/llvm/llvm-project/pull/108769