Check if element has two children before highlighting

src/jellyfin-quick-delete.user.js

@@ -151,9 +151,11 @@
 
     for (let i = 0; i < collection.length; i++) {
       let curr = collection[i];
+      if (curr.firstChild.firstChild !== null) {
         if (curr.firstChild.firstChild.classList.contains("audiotrack")) {
           curr.style.backgroundColor = "rgba(251, 73, 52, 0.7)"
         }
+      }
 
       // Append buttons to list
       curr.appendChild(refreshButton());