Fails to load in rails 3.2 project

I have a current rails 3.2 project that fails to load. The try here seems to be calling the method. It also seems to me that you would never want nil here.

```
rails c
Connecting to database specified by database.yml
/Users/becker/.rvm/gems/ruby-1.9.3-p484@project/gems/railties-3.2.18/lib/rails/railtie/configuration.rb:85:in `method_missing': undefined method `secret_key_base' for #<Rails::Application::Configuration:0x007feaaf523f40> (NoMethodError)
	from /Users/becker/.rvm/gems/ruby-1.9.3-p484@project/gems/activesupport-3.2.18/lib/active_support/core_ext/object/try.rb:36:in `try'
	from /Users/becker/.rvm/gems/ruby-1.9.3-p484@project/gems/ahoy_email-0.1.4/lib/ahoy_email/engine.rb:5:in `block in <class:Engine>'
	from /Users/becker/.rvm/gems/ruby-1.9.3-p484@project/gems/railties-3.2.18/lib/rails/initializable.rb:30:in `instance_exec'
```
Merge pull request #2 from sbeckeriv/patch-1

Fails to load in rails 3.2 project