patch 8.2.3332: Vim9: cannot assign to range in list

Problem:    Vim9: cannot assign to range in list.
Solution:   Implement overwriting a list range.
diff --git a/src/proto/list.pro b/src/proto/list.pro
index c3c3227..97e6c47 100644
--- a/src/proto/list.pro
+++ b/src/proto/list.pro
@@ -30,6 +30,9 @@
 int list_append_number(list_T *l, varnumber_T n);
 int list_insert_tv(list_T *l, typval_T *tv, listitem_T *item);
 void list_insert(list_T *l, listitem_T *ni, listitem_T *item);
+listitem_T *check_range_index_one(list_T *l, long *n1, int quiet);
+int check_range_index_two(list_T *l, long *n1, listitem_T *li1, long *n2, int quiet);
+int list_assign_range(list_T *dest, list_T *src, long idx1_arg, long idx2, int empty_idx2, char_u *op, char_u *varname);
 void f_flatten(typval_T *argvars, typval_T *rettv);
 void f_flattennew(typval_T *argvars, typval_T *rettv);
 int list_extend(list_T *l1, list_T *l2, listitem_T *bef);