bcachefs: fix kasan splat

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/recovery.c

@@ -721,10 +721,12 @@ int bch2_fs_recovery(struct bch_fs *c)
 
 	ret = bch2_blacklist_table_initialize(c);
 
+	if (!list_empty(&journal_entries)) {
 		ret = verify_journal_entries_not_blacklisted_or_missing(c,
 							&journal_entries);
 		if (ret)
 			goto err;
+	}
 
 	ret = bch2_fs_journal_start(&c->journal, journal_seq,
 				    &journal_entries);