Index: trunk/src/undo.c
===================================================================
--- trunk/src/undo.c	(revision 13478)
+++ trunk/src/undo.c	(revision 13479)
@@ -241,6 +241,17 @@
 	return (Locked);
 }
 
+uundo_serial_t pcb_undo_serial(void)
+{
+	return pcb_uundo.serial;
+}
+
+
+void pcb_undo_truncate_from(uundo_serial_t sfirst)
+{
+	uundo_list_truncate_from(&pcb_uundo, sfirst);
+}
+
 int undo_check(void)
 {
 	const char *res = uundo_check(&pcb_uundo, NULL);
Index: trunk/src/undo.h
===================================================================
--- trunk/src/undo.h	(revision 13478)
+++ trunk/src/undo.h	(revision 13479)
@@ -45,6 +45,10 @@
 void pcb_undo_unlock(void);
 pcb_bool pcb_undoing(void);
 
+uundo_serial_t pcb_undo_serial(void);
+void pcb_undo_truncate_from(uundo_serial_t sfirst);
+
+
 /* Returns 0 if undo integrity is not broken */
 int undo_check(void);