message: macOS: fixes segfault on nightly
  fixes
diff: @@ -23,11 +23,11 @@ pub fn set_locale_environment() {
  let locale_id = unsafe {
  let locale_class = Class::get("NSLocale").unwrap();
  let locale: *const Object = msg_send![locale_class, currentLocale];
  - msg_send![locale_class, release];
  + let _ : () = msg_send![locale_class, release];
  let identifier: *const Object = msg_send![locale, localeIdentifier];
  - msg_send![locale, release];
  + let _ : () = msg_send![locale, release];
  let identifier_str = nsstring_as_str(identifier).to_owned();
  - msg_send![identifier, release];
  + let _ : () = msg_send![identifier, release];
  identifier_str
  };
  let locale_id = locale_id + ".UTF-8";
  