fix the memory leak problem
fix the memory leak problem

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