Fix `_arg_cast`
Fix `_arg_cast`

This has been an issue from the day one,

A lot of people mentioned this on discord too
godotengine/godot-cpp,GodotNativeTools/godot-cpp,godotengine/godot-cpp,GodotNativeTools/godot-cpp,GodotNativeTools/cpp_bindings,GodotNativeTools/godot-cpp,godotengine/godot-cpp,godotengine/godot-cpp,GodotNativeTools/cpp_bindings