base class ‘class boost::ptr_container_detail::ptr_map_adapter_base<chart::VDataSequence, std::__debug::map<rtl::OUString, void*, std::less<rtl::OUString>, std::allocator<std::pair<const rtl::OUString, void*> > >, boost::heap_clone_allocator, true>’ should be explicitly initialized in the copy constructor [-Werror=extra]