Merge zhe@bk-internal.mysql.com:/home/bk/mysql-5.0-rpl

into  mail.hezx.com:/media/sda3/work/mysql/bkwork/bug26489_corruption_in_relay_log/5.0

sql/sql_parse.cc

@@ -1999,7 +1999,6 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
       unregister_slave(thd,1,1);
       /*  fake COM_QUIT -- if we get here, the thread needs to terminate */
       error = TRUE;
-      net->error = 0;
       break;
     }
 #endif