Merge pull request #437 from reisel/patch-1

fix invalid path join #436

Author: ob-stripe

lib/StripeResource.js

@@ -72,7 +72,7 @@ StripeResource.prototype = {
   createResourcePathWithSymbols: function(pathWithSymbols) {
     return '/' + path.join(
       this.resourcePath,
-      pathWithSymbols
+      pathWithSymbols || ''
     ).replace(/\\/g, '/'); // ugly workaround for Windows
   },