restorer: last_pid_ns should be written without eol

Otherwise -EINVAL returned
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

restorer.c

@@ -461,7 +461,7 @@ self_len_end:
 							    sizeof(thread_args[i].mem_zone.stack));
 
 				last_pid_len = vprint_num(args->last_pid_buf, thread_args[i].pid - 1);
-				ret = sys_write(fd, args->last_pid_buf, last_pid_len);
+				ret = sys_write(fd, args->last_pid_buf, last_pid_len - 1);
 				if (ret < 0) {
 					write_num_n(__LINE__);
 					write_num_n(ret);