Add :without_protection in Rails 4 + protected_attributes gem

[malmckay]

Hi,
This change checks the arity of assign_attributes, rather than the Rails version.

In Rails 3 assign_attributes takes 1 param plus 1 optional param.
In Rails 4 assign_attributes takes 1 param plus 1 optional param, if the 'rails/protected_attributes' gem is loaded.

[pothoven]

Thanks for the fix!
I apologize for the delay in response, I didn't see the notification about this pull request. I've since gotten an alternate fix for this same problem (#14) so I need to evaluate which to include. Any thoughts in comparison?

[malmckay]

No worries for the delay.

I do like the simplicity of this change (#13). I haven't though through the other changes in #14, so I can't really comment on those :-)

[pothoven]

I agree, yours is a nice simple 1 line change that fixes the problem. On the other hand, the other fix may make the overall code a little simpler. Thanks for the feedback!

[pothoven]

I opted to go with PR #14 as it simplified the code overall, but I do appreciate the elegance of your fix and appreciate your contribution!