util: more export tweaks

lib/util.js

@@ -15,6 +15,9 @@ var debug = require('debug')('spotify-web:util');
  * Export namespaces decorator
  *
  * Inspired by AngularJS DI, but is in no way compatible and does not use the same syntax
+ * 
+ * @param {Object} object Object to decorate
+ * @param {Array|Function} namespaces Namespace objects to export
  * @api private
  */
 exports.export = function(object, namespaces) {
@@ -26,9 +29,13 @@ exports.export = function(object, namespaces) {
     object = object[1];
   }
 
+  if (!Array.isArray(namespaces))
+    namespaces = [namespaces];
+
   debug('exporting %d namespaces on %s', namespaces.length, objectName);
 
-  object['$exports'] = [];
+  if (!Array.isArray(object['$exports'])) 
+    object['$exports'] = [];
 
   namespaces.forEach(function(namespace){
     var name = namespace.name;