Suppress unused-variable warning

`key` is not used outside this assertion.

1 files changed, 1 insertions, 2 deletions

diff --git a/id_table.c b/id_table.c
index ade49cd8da..840ab46ee3 100644
--- a/id_table.c
+++ b/id_table.c
@@ -274,9 +274,8 @@ rb_id_table_foreach_with_replace(struct rb_id_table *tbl, rb_id_table_foreach_fu
 
     for (i=0; i<capa; i++) {
         if (ITEM_KEY_ISSET(tbl, i)) {
-            const id_key_t key = ITEM_GET_KEY(tbl, i);
             enum rb_id_table_iterator_result ret = (*func)(Qundef, tbl->items[i].val, data);
-            assert(key != 0);
+            assert(ITEM_GET_KEY(tbl, i));
 
             if (ret == ID_TABLE_REPLACE) {
                 VALUE val = tbl->items[i].val;