Fixed: issue attachments are saved even if the issue has been updated by another user (#3846).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2875 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/issues_controller.rb

@@ -211,6 +211,8 @@ class IssuesController < ApplicationController
   rescue ActiveRecord::StaleObjectError
     # Optimistic locking exception
     flash.now[:error] = l(:notice_locking_conflict)
+    # Remove the previously added attachments if issue was not updated
+    attachments.each(&:destroy)
   end
 
   def reply