Class constants vanish when model is regenerated with --force

[lmfmaier]

Phalcon DevTools Version: 3.4.0
Phalcon Version: 3.4.4

After regenerating a model with phalcon model <model> --force class constants defined at the top of the class definition are gone. Custom class methods and members defined before the regeneration are still there

[BeMySlaveDarlin]

Fixed this bug and some other bugs related to --force