[libc-commits] [libc] [libc][NFC] Fix "type qualifiers ignored on cast result type" GCC warning (PR #78509)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

> As in the compiler may do constant folding with a default rounding mode (rather than a rounding mode that may be changed during runtime)?

https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#index-frounding-math

https://github.com/llvm/llvm-project/pull/78509