LuceneQueryBuilder.visit on RelationQueryNode seems to handle null relPaths oddly

[Dave Brosius]

 Seems like absolute paths with similar and spellcheck operations are 
flawed if I'm reading the code correctly.


   public Object visit(RelationQueryNode node, Object data) throws 
RepositoryException {
        PathQueryNode relPath = node.getRelativePath();
        if (*relPath* == null
&& node.getOperation() != QueryConstants.OPERATION_SIMILAR
&& node.getOperation() != QueryConstants.OPERATION_SPELLCHECK) {
            exceptions.add(new InvalidQueryException("@* not supported 
in predicate"));
            return data;
        }
        LocationStepQueryNode[] steps = *relPath*.getPathSteps();