Fix a potential infinite loop condition, that causes the script to consume all ram on the box and get oom-killed.

scripts/order-symlinks.py

@@ -61,6 +61,9 @@ def create_symlinks(d):
         else:
             order.extend(data["pages"][work]["images"].values())
         if "prev" in data["pages"][work]:
+            if data["pages"][work]["prev"] == work:
+                work = None
+            else:
                 work = data["pages"][work]["prev"]
         else:
             work = None