Made peers(Term n) return an empty list rather than throw an exception if n is not an AST node in the flow graph.
Made peers(Term n) return an empty list rather than throw an exception if n is not an AST node in the flow graph.

liujed/polyglot-eclipse,blue-systems-group/project.maybe.polyglot,xcv58/polyglot,xcv58/polyglot,blue-systems-group/project.maybe.polyglot,xcv58/polyglot,liujed/polyglot-eclipse,liujed/polyglot-eclipse,blue-systems-group/project.maybe.polyglot,xcv58/polyglot,liujed/polyglot-eclipse,blue-systems-group/project.maybe.polyglot