[clang] [clang] Add fix for GH issue 83050 (PR #83071)

[Nick Desaulniers via cfe-commits]

nickdesaulniers wrote:

For the commit message and PR description, please consider:
1. using a subject that describes more of what the patch does, such as "[clang] fixes inf loop parsing fixed point literal"
2. put "Fixes #83050" in the commit body; when merged, github will auto close the corresponding issue.

https://github.com/llvm/llvm-project/pull/83071