[llvm] [NFC][BOLT] fix DIE traversal incorrect loop termination condition. (PR #208450)

[via llvm-commits]

Thrrreeee wrote:

> This doesn't seem to be an NFC change. Bug mentions warning was triggered. Can you add a test also?

Done. I have add addtional  BOLT check for such warnings.

https://github.com/llvm/llvm-project/pull/208450