message: fix xcode 14 build
diff: @@ -95,7 +95,8 @@ int main(int argc, char *const argv[]) {
  srand(getpid() + time(nullptr));
  do {
  - sprintf(fifo_filename, "/tmp/alive2_fifo_%lx", (unsigned long)rand());
  + snprintf(fifo_filename, sizeof(fifo_filename), "/tmp/alive2_fifo_%lx",
  + (unsigned long)rand());
  } while (access(fifo_filename, F_OK) == 0);
  int res = mkfifo(fifo_filename, 0666);
  