symfony/symfony — pull request #6845 by matts2cant (2013-01-23 10:59:57+00:00)
Title: [FrameworkBundle][Form] Enable empty value if choice field not required

| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | possible
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | ~
| License | MIT
| Doc PR | ~

When the field is not required, the empty value should be selectable.