replace Mailer deliver syntax to Rails3 style

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9638 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/news_observer.rb

@@ -17,6 +17,6 @@
 
 class NewsObserver < ActiveRecord::Observer
   def after_create(news)
-    Mailer.deliver_news_added(news) if Setting.notified_events.include?('news_added')
+    Mailer.news_added(news).deliver if Setting.notified_events.include?('news_added')
   end
 end