Fixed a mememory leak networking code

changelog

@@ -44,6 +44,7 @@ Version 1.5.0+svn:
    * dissallow_observers is on as default if side has controller=null
    * Fixed null-pointer reference in network code
    * Added possibility to use per fight EV statistics proposed by maboul
+   * Fixed a mememory leak in networking code
    * Removed bug introduced in 1.5.0 that allowed use of :debug commands during
      network play
    * added some includes to fix compilation problems with Sun Studio 12

src/network_worker.cpp

@@ -715,6 +715,7 @@ TCPsocket get_received_data(std::vector<char>& out)
 	received_data_queue.pop_front();
 	out.swap(buf->raw_buffer);
 	const TCPsocket res = buf->sock;
+	delete buf;
 	return res;
 }