[clang] [clang][CFG] Fix assertion failure in checkIncorrectLogicOperator (PR #142897)

[Balazs Benics via cfe-commits]

https://github.com/steakhal commented:

I don't think I have much to say. I never really touched floating-point stuff.
I left the comments I had while reading though.

https://github.com/llvm/llvm-project/pull/142897