PVS-Studio warning V547 for Boost

typedef SOCKET socket_type;

class socket_holder
{
  ....
  socket_type socket_;
  ....
  socket_type get() const { return socket_; }
  ....
};

template <typename Socket>
boost::system::error_code accept(....)
{
  ....
  // On success, assign new connection to peer socket object.
  if (new_socketnew_socket.get() >= 0)
  {
    if (peer_endpoint)
      peer_endpoint->resize(addr_len);
    if (!peer.assign(impl.protocol_, new_socket.get(), ec))
      new_socket.release();
  }
  return ec;
}

This suspicious code was found in Boost project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression 'new_socket.get() >= 0' is always true. Unsigned type value is always >= 0. win_iocp_socket_service.hpp 436

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