AdjacencyListDirectedGraph: Fix adding edges

alib2data/src/graph/directed/AdjacencyListDirectedGraph.cpp

@@ -90,6 +90,8 @@ void AdjacencyListDirectedGraph::addEdge(const DirectedEdge &edge)
 	}
 	edges.insert(edge);
+
+	adj[edge.getFromNode()].insert(edge.getToNode());
 }
 void AdjacencyListDirectedGraph::removeEdge(const DirectedEdge &edge)