Fixed 1 failure in ActionPack testsuite [rails#4613 state:resolved]

Signed-off-by: José Valim <[email protected]>

Author: HusseinMorsy

actionpack/test/template/form_helper_test.rb

@@ -449,8 +449,8 @@ def test_nil_id
                  text_area("post", "body", :id => nil)
     assert_dom_equal check_box("post", "secret", "id" => nil),
                  check_box("post", "secret", :id => nil)
-    assert_dom_equal radio_button("post", "secret", "id" => nil),
-                 radio_button("post", "secret", :id => nil)
+    assert_dom_equal radio_button("post", "secret", "0", "id" => nil),
+                 radio_button("post", "secret", "0", :id => nil)
   end
 
   def test_index