message: Remove errno setting
diff: @@ -146,7 +146,8 @@ pub unsafe extern "C" fn asctime_r(tm: *const tm, buf: *mut c_char) -> *mut c_ch
  match write_result {
  Ok(_) => buf,
  Err(_) => {
  - platform::errno = EIO;
  + /* asctime()/asctime_r() or the equivalent sprintf() call
  + * have no defined errno setting */
  core::ptr::null_mut()
  }
  }
  