adamwathan/form — pull request #21 by moura137 (2014-09-12 19:22:49+00:00)
Title: Fix getValueFor to return null, if there is no value to repopulate eleme...

In Class ```FormBuilder``` changed the method ```getValueFor``` to return null if there is no value to repopulate instead of empty string

So you can compare with ```is_null ()```, repopulando the element with the value string ```"0"```