Unwrapping objects with parameterized initializers should fail with warnings, not exceptions

[SFEley]

Because of an embedded object that we couldn't unwrap, I get:

ruby-1.9.1-p378 > c = Register::Person.email('[email protected]')
ArgumentError: wrong number of arguments (0 for 2)
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:132:in `new'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:132:in `unwrap_object'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:92:in `unwrap'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:135:in `block in unwrap_object'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:134:in `each'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:134:in `unwrap_object'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:92:in `unwrap'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:97:in `block in unwrap'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:97:in `map'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:97:in `unwrap'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:114:in `block in unwrap_hash'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:109:in `each'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:109:in `unwrap_hash'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/wrapper.rb:94:in `unwrap'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/piece.rb:82:in `initialize'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/piece.rb:20:in `new'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/piece.rb:20:in `first'
from /Volumes/seley01/Users/steve/.rvm/gems/ruby-1.9.1-p378@sinatra/gems/candy-0.2.6/lib/candy/piece.rb:56:in `method_missing'
from (irb):4
from /Volumes/seley01/Users/steve/.rvm/rubies/ruby-1.9.1-p378/bin/irb:17:in `<main>'