Missed ping when adding protocol argument

Author: Chris Park

lib/ping.js

@@ -36,7 +36,7 @@ function ping() {
  * @param {string} serviceURL - The base service URL to be used to access the Rosette API
  * @param {function} callback - Callback function to be exectuted after the function to which it is passed is complete
  */
-ping.prototype.getResults = function(parameters, userKey, serviceURL, callback) {
+ping.prototype.getResults = function(parameters, userKey, protocol, serviceURL, callback) {
 
     // configure URL
     var urlParts = URL.parse(serviceURL + "ping");