galetahub/simple-captcha — pull request #40 by bootleq (2013-09-05 08:44:24+00:00)
Title: Fix FormBuilder error when no Sprockets installed.

After merged #29, with Rails 3.0 and no Sprockets installed, we got an NameError:
`uninitialized constant SimpleCaptcha::FormBuilder::Sprockets`.

We can prevent including Sprockets::Helpers when they were not there.