Fixed function override changes required by change to  eval(java.util.List<com.hp.hpl.jena.sparql.expr.NodeValue>) in com.hp.hpl.jena.sparql.expr.ExprFunctionN

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1586147 13f79535-47bb-0310-9956-ffa450edef68