i18n.js in i18n-js-3.0.9

- old
+ new

@@ -386,11 +386,10 @@
   // public API.
   I18n.lookup = function(scope, options) {
     options = options || {}
 
     var locales = this.locales.get(options.locale).slice()
-      , requestedLocale = locales[0]
       , locale
       , scopes
       , fullScope
       , translations
     ;
@@ -445,11 +444,10 @@
 
   // Lookup dedicated to pluralization
   I18n.pluralizationLookup = function(count, scope, options) {
     options = options || {}
     var locales = this.locales.get(options.locale).slice()
-      , requestedLocale = locales[0]
       , locale
       , scopes
       , translations
       , message
     ;
@@ -609,9 +607,13 @@
     return translation;
   };
 
   // This function interpolates the all variables in the given message.
   I18n.interpolate = function(message, options) {
+    if (message === null) {
+      return message;
+    }
+
     options = options || {}
     var matches = message.match(this.placeholder)
       , placeholder
       , value
       , name