Add Object::cast_to for const Object*

[Zylann]

Before it wasn't possible to use Object::cast_to(obj) if obj was a const T*. Godot does the same thing: https://github.com/godotengine/godot/blob/908795301b9e4fcf24b115329a48d7d295c13a1a/core/object/object.h#L734-L764

[akien-mga]

Thanks!

[akien-mga]

Sounds like you might have omitted regenerating the bindings?

But it also means that the auto-detection that the bindings do need to be regenerated is not properly taking into account the binding_generator.py file as a dependency. (CC @Faless)

[aaronfranke]

Sorry for the confusion, you're right, a git clean fixed it. Still good to look into it not auto-regenerating.

[akien-mga]

But it also means that the auto-detection that the bindings do need to be regenerated is not properly taking into account the binding_generator.py file as a dependency. (CC @Faless)

So this was actually fixed by #838.