Index: trunk/src/polygon.c
===================================================================
--- trunk/src/polygon.c	(revision 37944)
+++ trunk/src/polygon.c	(revision 37945)
@@ -1798,7 +1798,7 @@
 		pcb_poly_init_clip(Destination, Layer, Polygon);
 		pcb_poly_bbox(Polygon);
 		if (!Layer->polygon_tree)
-			Layer->polygon_tree = rnd_r_create_tree();
+			rnd_rtree_init(Layer->polygon_tree = malloc(sizeof(rnd_rtree_t)));
 		rnd_rtree_insert(Layer->polygon_tree, Polygon, (rnd_rtree_box_t *)Polygon);
 
 		pcb_poly_invalidate_draw(Layer, Polygon);