Add missing support for the combination of CppClass parameter wich has implicit conversions (to it) and also a default value.
Add missing support for the combination of CppClass parameter wich has implicit conversions (to it) and also a default value.

caramucho/pybindgen,cawka/pybindgen,cawka/pybindgen,caramucho/pybindgen,caramucho/pybindgen,cawka/pybindgen,cawka/pybindgen,caramucho/pybindgen