remove warning
remove warning

daodaoliang/tcpcopy,caosiyang/tcpcopy,u20024804/tcpcopy,u20024804/tcpcopy,left2right/tcpcopy,sshling/tcpcopy,wfxiang08/tcpcopy,ycaihua/tcpcopy,eliteYang/tcpcopy,liviusATnetskope/second,daodaoliang/tcpcopy,wfxiang08/tcpcopy,ycaihua/tcpcopy,eliteYang/tcpcopy,left2right/tcpcopy,horryq/tcpcopy,caosiyang/tcpcopy,horryq/tcpcopy,sshling/tcpcopy,liviusATnetskope/second