use more concrete UNO types in unoxml

Change-Id: I50e22d15e02bde4c0e97c89b42fe3399d7a1dfe5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173412
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins

unoxml/source/dom/elementlist.cxx

@@ -36,7 +36,7 @@ using namespace css::xml::dom;
 using namespace css::xml::dom::events;
 namespace DOM { class CElementListImpl; }
 
-namespace
+namespace DOM
 {
     class WeakEventListener : public ::cppu::WeakImplHelper<css::xml::dom::events::XEventListener>
     {

unoxml/source/dom/elementlist.hxx

@@ -38,6 +38,7 @@
 
 namespace DOM
 {
+    class WeakEventListener;
     class CElement;
 
     class CElementListImpl
@@ -48,7 +49,7 @@ namespace DOM
         /** @short  proxy weak binding to forward Events to ourself without
                     an ownership cycle
           */
-        css::uno::Reference< css::xml::dom::events::XEventListener > m_xEventListener;
+        rtl::Reference< WeakEventListener > m_xEventListener;
 
         ::rtl::Reference<CElement> const m_pElement;
         ::osl::Mutex & m_rMutex;