Not generating jbuilder views when generating scaffold_controller

Hi,
I found out a bug and tried to fix it but couldn't.

If I run ``rails generate scaffold_controller blablabla`` instead of ``rails generate scaffold blabalba`` I don't get the jbuilder views generated.

```
☁  peggy [master] ⚡ rails g scaffold_controller Contact name mail_subject internal_name parent_id:integer -p
      create  app/controllers/contacts_controller.rb
      invoke  erb
      create    app/views/contacts
      create    app/views/contacts/index.html.erb
      create    app/views/contacts/edit.html.erb
      create    app/views/contacts/show.html.erb
      create    app/views/contacts/new.html.erb
      create    app/views/contacts/_form.html.erb
      invoke  helper
      create    app/helpers/contacts_helper.rb
```	  

```	  
☁  peggy [master] ⚡ rails g scaffold Contact name mail_subject internal_name parent_id:integer -p          
      invoke  active_record
      create    db/migrate/20130228130115_create_contacts.rb
      create    app/models/contact.rb
      invoke  resource_route
       route    resources :contacts
      invoke  jbuilder_scaffold_controller
      create    app/controllers/contacts_controller.rb
      invoke    erb
      create      app/views/contacts
      create      app/views/contacts/index.html.erb
      create      app/views/contacts/edit.html.erb
      create      app/views/contacts/show.html.erb
      create      app/views/contacts/new.html.erb
      create      app/views/contacts/_form.html.erb
      invoke    helper
      create      app/helpers/contacts_helper.rb
      invoke    jbuilder
      create      app/views/contacts
      create      app/views/contacts/index.json.jbuilder
      create      app/views/contacts/show.json.jbuilder
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/contacts.js.coffee
      invoke    scss
      create      app/assets/stylesheets/contacts.css.scss
      invoke  scss
```

Tried to fix it (see pull request), but it didn't solved the problem.
Any hints on what can be causing the problem?

I'm running Rails 4.0.0.beta1 under ruby 2.0.0-p0.

Note: the pull requests DOESN'T SOLVE THE PROBLEM.