[Backward Compatibility][Break] NumberToLocalizedStringTransformer

Hello,

With the new version of symfony 2.7.11, i have a break with the form number transformer.
If i set my validator to @Assert\Type("float") and that my submitted value doesn't contain a decimal separator, the transformer use \NumberFormatter::TYPE_INT64 instead of \NumberFormatter::TYPE_DOUBLE.

Any reason to change this feature ?