Inconsistency between generated Base forms and sfFormPropel updateDefaultsFromObject()

[VanTanev]

In the template generator we have the function defined as public: https://github.com/propelorm/sfPropelORMPlugin/blob/cc9a024454274feaf17addafef5cc88df7cbbb9a/data/generator/sfPropelForm/default/template/sfPropelFormGeneratedTemplate.php#L73

But in sfFormPropel it is protected: https://github.com/propelorm/sfPropelORMPlugin/blob/dde89f5b4b657e24cacb8da949b7a11ed21a3169/lib/form/sfFormPropel.class.php#L369

[VanTanev]

Bump, this is an easy fix