BUILD: quic: fix build warning when threads are disabled

Commit e83f937cc ("MEDIUM: quic: use a global CID trees list") uses a
local variable "tree" used only for locks, but when threads are disabled
it spews a warning about this unused variable.

diff --git a/include/haproxy/quic_conn.h b/include/haproxy/quic_conn.h
index ef1ccf473897f79346dd360ddf4d765bc37067c2..4640e08d05e328804bb6f9d925110abb1f17816f 100644 (file)
--- a/include/haproxy/quic_conn.h
+++ b/include/haproxy/quic_conn.h
@@ -165,7 +165,7 @@ static inline void quic_cid_insert(struct quic_connection_id *conn_id)
 static inline void quic_cid_delete(struct quic_connection_id *conn_id)
 {
        const uchar idx = quic_cid_tree_idx(&conn_id->cid);
-       struct quic_cid_tree *tree = &quic_cid_trees[idx];
+       struct quic_cid_tree __maybe_unused *tree = &quic_cid_trees[idx];
 
        HA_RWLOCK_WRLOCK(QC_CID_LOCK, &tree->lock);
        ebmb_delete(&conn_id->node);