Guard for champ SIRET without etablissement

app/views/new_gestionnaire/dossiers/_champs.html.haml

@@ -51,6 +51,7 @@
             = "#{c.libelle} :"
           %td.rich-text
             %span{ class: highlight_if_unseen_class(demande_seen_at, c.updated_at) }
+              - if c.etablissement.present?
                 = render partial: "new_gestionnaire/dossiers/identite_entreprise", locals: { etablissement: c.etablissement }
         - else
           %th.libelle