Index: obj_poly.h
===================================================================
--- obj_poly.h	(revision 14719)
+++ obj_poly.h	(revision 14720)
@@ -76,6 +76,9 @@
 void pcb_poly_move(pcb_poly_t *Polygon, pcb_coord_t DX, pcb_coord_t DY);
 pcb_poly_t *pcb_poly_copy(pcb_poly_t *Dest, pcb_poly_t *Src, pcb_coord_t dx, pcb_coord_t dy);
 
+/* hash */
+unsigned int pcb_subc_poly_hash(pcb_coord_t ox, pcb_coord_t oy, const pcb_poly_t *p);
+
 /* Add objects without creating them or making any "sanity modifications" to them */
 void pcb_add_poly_on_layer(pcb_layer_t *Layer, pcb_poly_t *polygon);