[runmode addon] Fix missing parameter in runmode.node.js

Closes #2188

addon/runmode/runmode.node.js

@@ -99,7 +99,7 @@ exports.getMode = function(options, spec) {
 };
 exports.registerHelper = exports.registerGlobalHelper = Math.min;
 
-exports.runMode = function(string, modespec, callback) {
+exports.runMode = function(string, modespec, callback, options) {
   var mode = exports.getMode({indentUnit: 2}, modespec);
   var lines = splitLines(string), state = (options && options.state) || exports.startState(mode);
   for (var i = 0, e = lines.length; i < e; ++i) {