Index: trunk/src_plugins/act_draw/act_pstk_proto.c
===================================================================
--- trunk/src_plugins/act_draw/act_pstk_proto.c	(revision 26251)
+++ trunk/src_plugins/act_draw/act_pstk_proto.c	(revision 26252)
@@ -195,9 +195,13 @@
 				proto->tr.array[n].shape[dst_idx].comb = dlyc;
 			}
 			pcb_pstk_proto_update(proto);
-			break;
+			PCB_ACT_IRES(0);
+			return 0;
 
 		default:
 			return FGW_ERR_ARG_CONV;
 	}
+
+	PCB_ACT_IRES(-1);
+	return 0;
 }