`c_char` is i8 on x86_64 and u8 on aarch64, so `cert_pem_out as *mut u8`
is a REQUIRED conversion on one target and a no-op on the other — where
clippy::unnecessary_cast then denies it. `.cast::<u8>()` is correct and
lint-clean on both.
Caught by the new aarch64 clippy leg on its first run. A sweep of the
remaining `as *mut u8` / `as *const u8` sites in the client crates found no
other c_char-derived casts; the rest convert from c_void or u16.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
enricobuehlerandClaude Opus 5
ab3884c763