Fix warning

src/de/tudarmstadt/maki/simonstrator/api/component/topology/OperationalEdge.java

@@ -96,7 +96,7 @@ public class OperationalEdge extends DirectedEdge {
 
 	public IEdge getEdge() {
 		return Graphs.createDirectedWeightedEdge(this.fromId(), this.toId(),
-				this.getWeight());
+				this.getProperty(GenericGraphElementProperties.WEIGHT));
 	}
 
 	@Override