Index: obj_pstk.h
===================================================================
--- obj_pstk.h	(revision 12778)
+++ obj_pstk.h	(revision 12779)
@@ -137,7 +137,10 @@
 /* Deep copy a prototype */
 void pcb_pstk_proto_copy(pcb_pstk_proto_t *dst, const pcb_pstk_proto_t *src);
 
+/* grow (or shrink) a prototype to or by offs - change the proto in place */
+void pcb_pstk_proto_grow(pcb_pstk_proto_t *proto, pcb_bool is_absolute, pcb_coord_t offs);
 
+
 /*** hash ***/
 unsigned int pcb_pstk_hash(const pcb_pstk_proto_t *p);
 int pcb_pstk_eq(const pcb_pstk_proto_t *p1, const pcb_pstk_proto_t *p2);