Make sure user can not watch what he is not allowed to view.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3170 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/watchers_controller.rb

@@ -25,7 +25,11 @@ class WatchersController < ApplicationController
          :render => { :nothing => true, :status => :method_not_allowed }
   
   def watch
-    set_watcher(User.current, true)
+    if @watched.respond_to?(:visible?) && !@watched.visible?(User.current)
+      render_403
+    else
+      set_watcher(User.current, true)
+    end
   end
   
   def unwatch