Index: polygon_act.c
===================================================================
--- polygon_act.c	(revision 4756)
+++ polygon_act.c	(revision 4757)
@@ -69,7 +69,7 @@
 
 				gui->get_coords(_("Select an Object"), &x, &y);
 				if ((type = SearchScreen(x, y, PCB_TYPE_POLYGON, &ptr1, &ptr2, &ptr3)) != PCB_TYPE_NONE) {
-					MorphPolygon((LayerType *) ptr1, (PolygonType *) ptr3);
+					MorphPolygon((pcb_layer_t *) ptr1, (PolygonType *) ptr3);
 					Draw();
 					IncrementUndoSerialNumber();
 				}