Adds a named route for thumbnails and use route helper in #thumbnail_tag.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11188 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -160,8 +160,8 @@ module ApplicationHelper
   end
 
   def thumbnail_tag(attachment)
-    link_to image_tag(url_for(:controller => 'attachments', :action => 'thumbnail', :id => attachment)),
-      {:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename},
+    link_to image_tag(thumbnail_path(attachment)),
+      named_attachment_path(attachment, attachment.filename),
       :title => attachment.filename
   end