initialize these variables before use to prevent warnings

actions/othersettings.php

@@ -98,7 +98,9 @@ class OthersettingsAction extends AccountSettingsAction
         $this->hidden('token', common_session_token());
         $this->elementStart('ul', 'form_data');
 
+        $shorteners = array();
         Event::handle('GetUrlShorteners', array(&$shorteners));
+        $services = array();
         foreach($shorteners as $name=>$value)
         {
             $services[$name]=$name;