Fixed that SCM selection is not saved when all SCM are disabled (#9937).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8568 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/functional/settings_controller_test.rb

@@ -42,6 +42,8 @@ class SettingsControllerTest < ActionController::TestCase
     get :edit
     assert_response :success
     assert_template 'edit'
+
+    assert_tag 'input', :attributes => {:name => 'settings[enabled_scm][]', :value => ''}
   end
 
   def test_post_edit_notifications