fix bad call to simple webclient auth

library/Class/WebService/BibNumerique/Dilicom/Hub.php

@@ -250,7 +250,7 @@ class Class_WebService_BibNumerique_Dilicom_Hub extends Class_WebService_Abstrac
                 Class_AdminVar::get('DILICOM_PNB_PWD_COLLECTIVITE'));
 
     $data = $this->httpGet($this->buildUrl($service, $params));
-    static::getHttpClient()->setAuth(null);
+    static::getHttpClient()->setAuth(null, null);
     return $data;
   }