Test existence de lien(s) galleys

resources/javascript/xml_2_html.js

@@ -8,6 +8,7 @@ window.addEventListener('DOMContentLoaded', (event) => {
     });
 
     //move galley links
+     if(document.querySelector("div.item.galleys"))
         document.querySelector(".left-contents").prepend(document.querySelector("div.item.galleys"))
 
     //footnotes binding