Merged r2164 to r2167, r2188 and r2189 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/0.8-stable@2216 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/acts_as_watchable/lib/acts_as_watchable.rb

@@ -14,6 +14,8 @@ module Redmine
           class_eval do
             has_many :watchers, :as => :watchable, :dependent => :delete_all
             has_many :watcher_users, :through => :watchers, :source => :user
+            
+            attr_protected :watcher_ids, :watcher_user_ids
           end
         end
       end