fixed Subject model after_initialize callback for test_oracle_synonym test

activerecord/test/models/subject.rb

@@ -1,12 +1,16 @@
 # used for OracleSynonymTest, see test/synonym_test_oracle.rb
 #
 class Subject < ActiveRecord::Base
-  protected
+
   # added initialization of author_email_address in the same way as in Topic class
   # as otherwise synonym test was failing
-    def after_initialize
+  after_initialize :set_email_address
+
+  protected
+    def set_email_address
       if self.new_record?
         self.author_email_address = 'test@test.com'
       end
     end
+
 end