Qt: AboutDialog: widget must still process its own events

modules/gui/qt4/dialogs/help.cpp

@@ -151,8 +151,10 @@ bool AboutDialog::eventFilter(QObject *obj, QEvent *event)
             }
             return true;
         }
+        return false;
     }
-    return false;
+
+    return QVLCDialog::eventFilter( obj, event);
 }
 #ifdef UPDATE_CHECK