dump: move check_xids to dump_pstree

because in collect_pstree we don't know pid-s of processes inside pidns
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-dump.c

@@ -1409,9 +1409,6 @@ try_again:
 		free_pstree(root_item);
 	}
 
-	if (!ret)
-		ret = check_xids(root_item);
-
 	return ret;
 }
 
@@ -1426,6 +1423,10 @@ static int dump_pstree(struct pstree_item *root_item)
 	pr_info("Dumping pstree (pid: %d)\n", root_item->pid.real_pid);
 	pr_info("----------------------------------------\n");
 
+	ret = check_xids(root_item);
+	if (ret)
+		return -1;
+
 	pstree_fd = open_image(CR_FD_PSTREE, O_DUMP);
 	if (pstree_fd < 0)
 		return -1;