django/django — pull request #3774 by dcramer (2014-12-22 20:25:23+00:00)
Title: Ensure TypedChoiceField validates any non-empty value

This ensures that a '0' value in an integer-based TypedChoiceField gets validated correctly.

Previously this would not ever get validated, as passing a '0' value would skip any kind of field validation:
```
class MyForm(forms.Form):
choice = forms.TypedChoiceField(choices=[], coerce=int)
```