avoid error occured when channel title is only a String

app/models/site_feed_annc.rb

@@ -74,7 +74,7 @@ class SiteFeedAnnc
     end.compact
   end
   def channel_title(locale=I18n.locale)
-    self[:channel_title][locale]
+    self[:channel_title][locale] rescue self[:channel_title]
   end
   def category
     Category.find(self.merge_with_category) rescue nil