Adds Redmine::Utils.random_hex for generating a random hex string.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9071 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/attachments_controller.rb

@@ -69,7 +69,7 @@ class AttachmentsController < ApplicationController
 
     @attachment = Attachment.new(:file => request.body)
     @attachment.author = User.current
-    @attachment.filename = ActiveSupport::SecureRandom.hex(16)
+    @attachment.filename = Redmine::Utils.random_hex(16)
 
     if @attachment.save
       respond_to do |format|