bcachefs: Fix a debug assertion

This assertion was passing the wrong btree node type when inserting into
interior nodes.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_update_leaf.c

@@ -250,7 +250,8 @@ static inline void btree_insert_entry_checks(struct btree_trans *trans,
 
 	BUG_ON(bkey_cmp(insert->k.p, iter->pos));
 	BUG_ON(debug_check_bkeys(c) &&
-	       bch2_bkey_invalid(c, bkey_i_to_s_c(insert), iter->btree_id));
+	       bch2_bkey_invalid(c, bkey_i_to_s_c(insert),
+				 __btree_node_type(iter->level, iter->btree_id)));
 }
 
 static noinline int