Index: obj_pstk_inlines.h
===================================================================
--- obj_pstk_inlines.h	(revision 19519)
+++ obj_pstk_inlines.h	(revision 19520)
@@ -266,4 +266,23 @@
 }
 
 
+PCB_INLINE pcb_pstk_shape_t *pcb_pstk_hshadow_shape(pcb_pstk_t *ps, pcb_pstk_shape_t *forbidden, pcb_pstk_shape_t *tmpshp)
+{
+						pcb_pstk_proto_t *proto = pcb_pstk_get_proto(ps);
+						pcb_pstk_tshape_t *ts = pcb_pstk_get_tshape(ps);
+						if (proto->mech_idx >= 0) {
+							pcb_pstk_shape_t *s = ts->shape + proto->mech_idx;
+							if (s == forbidden) /* self-ref: hshadow in a mech layer type */
+								return NULL;
+							return s;
+						}
+						else {
+							tmpshp->shape = PCB_PSSH_CIRC;
+							tmpshp->data.circ.x = 0;
+							tmpshp->data.circ.y = 0;
+							tmpshp->data.circ.dia = proto->hdia;
+							return tmpshp;
+						}
+}
+
 #endif