Fixed that open scope on Project#issues raises an error (#11545).

Patch by Petr Pospisil.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10199 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/initializers/10-patches.rb

@@ -10,6 +10,11 @@ module ActiveRecord
       l("field_#{name.underscore.gsub('/', '_')}_#{attr}", :default => ["field_#{attr}".to_sym, attr])
     end
   end
+
+  # Undefines private Kernel#open method to allow using `open` scopes in models.
+  # See Defect #11545 (http://www.redmine.org/issues/11545) for details.
+  class Base ; undef open ; end
+  class Relation ; undef open ; end
 end
 
 module ActionView