fix FSChangeDecoration param not defined

src/facilities/fsDecoration.js

@@ -148,10 +148,10 @@ App.UI.facilityRedecoration = function() {
 /**
  *
  * @param {FC.FutureSociety} FS
- * @param {Array} items
+ * @param {Array} [items]
  * @returns {HTMLElement}
  */
-App.UI.FSChangeDecoration = function(FS, items) {
+App.UI.FSChangeDecoration = function(FS, items = []) {
 	const el = document.createElement("div");
 	el.classList.add("indent");
 	const FSDecoration = FS + "Decoration";