i.e.
source/controller/dialogs/ChartTypeTemplateProvider.hxx

class ChartTypeTemplateProvider
{
public:
    virtual ::com::sun::star::uno::Reference<
                ::com::sun::star::chart2::XChartTypeTemplate >
getCurrentTemplate() const =0;
};

and in source/controller/inc/dlg_DataSource.hxx

class DataSourceDialog :
...
    ::std::auto_ptr< ChartTypeTemplateProvider >  m_apDocTemplateProvider;


source/controller/dialogs/dlg_DataSource.cxx

        m_apDocTemplateProvider( new DocumentChartTypeTemplateProvider(
xChartDocument )),

so, when m_apDocTemplateProvider goes out of scope, it does *not* call
DocumentChartTypeTemplateProvider::~DocumentChartTypeTemplateProvider

ResourceChangeListener is similar, but as it happens no direct delete on that
base occurs, but safest to add a virtual dtor to it as well, patch attached to
add virtual dtors to both.