Merge pull request #25 from abetomo/fix_pathjs_error

Fix as cli failed

Author: zeke

cli.js

@@ -27,6 +27,7 @@ program
   .option('-f, --fix', 'Attempt to fix basic standard JS issues')
   .option('-v, --verbose', 'Verbose mode')
   .action(function (cwdValue, patternArgs) {
+    if (cwdValue == null) return
     // If cwd is an actual path, set it to be the cwd
     // Otherwise interpret it as a glob pattern
     if (fs.existsSync(path.resolve(cwdValue)) && fs.lstatSync(path.resolve(cwdValue)).isDirectory()) {