Fixed that #reload raises a Stack too deep error with ruby 2.0.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11497 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -184,11 +184,12 @@ class Issue < ActiveRecord::Base
     super
   end
 
+  alias :base_reload :reload
   def reload(*args)
     @workflow_rule_by_attribute = nil
     @assignable_versions = nil
     @relations = nil
-    super
+    base_reload(*args)
   end
 
   # Overrides Redmine::Acts::Customizable::InstanceMethods#available_custom_fields