[[FIX]] default to empty string in src/cli.js loadIgnores

Related to nodejs/node#1153

Author: stringparser

Diff for: src/cli.js

@@ -191,7 +191,7 @@ function findFile(name, cwd) {
  * @return {array} a list of files to ignore.
  */
 function loadIgnores(params) {
-  var file = findFile(params.excludePath || ".jshintignore", params.cwd);
+  var file = findFile(params.excludePath || ".jshintignore", params.cwd) || '';
 
   if (!file && !params.exclude) {
     return [];