system/luaserver: Terminate Lua script when luaclient dies.

Origin commit data
------------------
Commit: ffec667030
Author: martii <m4rtii@gmx.de>
Date: 2014-10-13 (Mon, 13 Oct 2014)

src/system/luaserver.h

@@ -32,6 +32,7 @@ class CLuaServer
 
 		static void *luaserver_thread(void *arg);
 		static void *luaserver_main_thread(void *);
+		static void *luaclient_watchdog(void *);
 		static bool luaserver_parse_command(CBasicMessage::Header &rmsg, int connfd);
 		static void Lock();
 		static void UnLock();