jruby/jruby — pull request #425 by prathamesh-sonpatki (2012-12-03 19:51:19+00:00)
Title: Fixed implicitly creating a vertex if it is absent while removing a edge or vertex

`vertexFor` method in `src/org/jruby/ir/util/DirectedGraph.java` creates a vertex implicitly.
While removing a edge or vertex there is no need to create this vertex implicitly by `vertexFor` method.