message: Add missing variable name
diff: @@ -234,7 +234,7 @@ namespace network {
  expected<void> keepalive(native_socket fd, bool new_value) {
  CAF_LOG_TRACE(CAF_ARG(fd) << CAF_ARG(new_value));
  - char = new_value ? 1 : 0;
  + char value = new_value ? 1 : 0;
  CALL_CFUN(res, detail::cc_zero, "setsockopt",
  setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &value,
  static_cast<int>(sizeof(value))));
  