hotline#174979 : Cyberlibris : adding Poster support

library/Class/WebService/OAI/DublinCoreParser/ForRessourceNumerique.php

@@ -100,7 +100,7 @@ class Class_WebService_OAI_DublinCoreParser_ForRessourceNumerique
         : $resource->setExternalUri($relation);
 
     foreach (($this->_record['posters'] ?? []) as $poster)
-      $resource->addPoster($posters);
+      $resource->addPoster($poster);
 
     return parent::endRecord($data);
   }