abstract_tcp_server2: fix use after free

contrib/epee/include/net/abstract_tcp_server2.inl

@@ -652,13 +652,13 @@ PRAGMA_WARNING_DISABLE_VS(4355)
     m_timer.cancel();
     boost::system::error_code ignored_ec;
     socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
-    m_was_shutdown = true;
-    m_protocol_handler.release_protocol();
     if (!m_host.empty())
     {
       host_count(m_host, -1);
       m_host = "";
     }
+    m_was_shutdown = true;
+    m_protocol_handler.release_protocol();
     return true;
   }
   //---------------------------------------------------------------------------------