Adds attachments accessor to WikiContent::Version (#23242).

Patch by Jens Kraemer.

git-svn-id: http://svn.redmine.org/redmine/trunk@15610 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/wiki_content.rb

@@ -118,6 +118,10 @@ class WikiContent < ActiveRecord::Base
       page.project
     end
 
+    def attachments
+      page.nil? ? [] : page.attachments
+    end
+
     # Return true if the content is the current page content
     def current_version?
       page.content.version == self.version