Geoloc tab : Indirect modification of overloaded property Piwik_View::$locationProviders has no effect

After installing piwik 1.9 i got this message in the Tab : Setting /geolocation even geolcation look like to work …
Any help apreciate

There is an error. Please report the message (Piwik 1.9) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Notice: Indirect modification of overloaded property Piwik_View::$locationProviders has no effect in /www/piwik/plugins/UserCountry/Controller.php on line 46

Backtrace -->

#0 Piwik_ErrorHandler(…) called at [/www/piwik/plugins/UserCountry/Controller.php:46]
#1 Piwik_UserCountry_Controller->adminIndex(…) called at [:]
#2 call_user_func_array(…) called at [/www/piwik/core/FrontController.php:138]
#3 Piwik_FrontController->dispatch(…) called at [/www/piwik/index.php:53]

Thanks for the report, fixed in: http://dev.piwik.org/trac/changeset/7320