show: Fixup nit left after merging

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

cr-show.c

@@ -468,7 +468,7 @@ static int cr_show_all(unsigned long pid, struct cr_options *opts)
 	 * time here, but this saves us from code duplication.
 	 */
 	lseek(cr_fdset->fds[CR_FD_PSTREE], MAGIC_OFFSET, SEEK_SET);
-	show_pstree(cr_fdset->fds[CR_FD_PSTREE]);
+	show_pstree(cr_fdset->fds[CR_FD_PSTREE], NULL);
 
 	close_cr_fdset(&cr_fdset);