suppress gcc warning about DWET_XXX enumeration values not handled in switch

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41498 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/dfb/toplevel.cpp

@@ -527,6 +527,10 @@ void wxTopLevelWindowDFB::HandleDFBWindowEvent(const wxDFBWindowEvent& event_)
             wxFAIL_MSG( _T("invalid event type") );
             break;
         }
+
+        default:
+            // we're not interested in them here
+            break;
     }
 
     if ( !recipient )