patch 8.2.0159: non-materialized range() list causes problems

Problem:    Non-materialized range() list causes problems. (Fujiwara Takuya)
Solution:   Materialize the list where needed.
diff --git a/src/eval.c b/src/eval.c
index a9d0c7d..f017243 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -4205,7 +4205,7 @@
     cur_l = l;
     for (;;)
     {
-	if (!abort)
+	if (!abort && cur_l->lv_first != &range_list_item)
 	    // Mark each item in the list.  If the item contains a hashtab
 	    // it is added to ht_stack, if it contains a list it is added to
 	    // list_stack.