add operator* to uno::Reference

like the other smart pointer types

Change-Id: I3ac1888c84fc1411cdfc3357b005afbb3b7d8bbe
Reviewed-on: https://gerrit.libreoffice.org/65926Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

accessibility/source/extended/accessibletabbar.cxx

@@ -471,7 +471,7 @@ namespace accessibility
                 else
                     aFont = m_pTabBar->GetFont();
                 VCLXFont* pVCLXFont = new VCLXFont;
-                pVCLXFont->Init( *xDev.get(), aFont );
+                pVCLXFont->Init( *xDev, aFont );
                 xFont = pVCLXFont;
             }
         }

accessibility/source/standard/accessiblemenucomponent.cxx

@@ -310,7 +310,7 @@ Reference< awt::XFont > OAccessibleMenuComponent::getFont(  )
             {
                 const StyleSettings& rStyleSettings = Application::GetSettings().GetStyleSettings();
                 VCLXFont* pVCLXFont = new VCLXFont;
-                pVCLXFont->Init( *xDev.get(), rStyleSettings.GetMenuFont() );
+                pVCLXFont->Init( *xDev, rStyleSettings.GetMenuFont() );
                 xFont = pVCLXFont;
             }
         }

include/com/sun/star/uno/Reference.h

@@ -421,6 +421,16 @@ public:
         return castFromXInterface(_pInterface);
     }
 
+    /** Indirection operator.
+
+        @since LibreOffice 6.3
+        @return UNacquired interface reference
+    */
+    interface_type & SAL_CALL operator * () const {
+        assert(_pInterface != NULL);
+        return *castFromXInterface(_pInterface);
+    }
+
     /** Gets interface pointer. This call does not acquire the interface.
 
         @return UNacquired interface pointer