Allow a virtual method returning Class* with caller_owns_return=True, even when the class is not copyable, by stealing the original pointer.
Allow a virtual method returning Class* with caller_owns_return=True, even when the class is not copyable, by stealing the original pointer.

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