Index: trunk/src/obj_pstk_proto.c
===================================================================
--- trunk/src/obj_pstk_proto.c	(revision 20435)
+++ trunk/src/obj_pstk_proto.c	(revision 20436)
@@ -1167,9 +1167,11 @@
 		int n;
 
 		for(n = 0; n < pcb->RouteStyle.used; n++) {
-			pcb_cardinal_t pid = pcb->RouteStyle.array[n].via_proto;
-			if ((pid >= 0) && (pid < len))
-				res[pid]++;
+			if (pcb->RouteStyle.array[n].via_proto_set) {
+				pcb_cardinal_t pid = pcb->RouteStyle.array[n].via_proto;
+				if ((pid >= 0) && (pid < len))
+					res[pid]++;
+			}
 		}
 	}