Adds child_pages macro for wiki pages (#528).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1699 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -206,7 +206,7 @@ module ApplicationHelper
     options = args.last.is_a?(Hash) ? args.pop : {}
     case args.size
     when 1
-      obj = nil
+      obj = options[:object]
       text = args.shift
     when 2
       obj = args.shift