Suppress "variable 'pagesaving' set but not used" warning.

With asserts disabled, late-model clang notices that this variable
is incremented but never otherwise read.

Discussion: https://postgr.es/m/3171401.1649275153@sss.pgh.pa.us

diff --git a/src/backend/access/nbtree/nbtdedup.c b/src/backend/access/nbtree/nbtdedup.c
index cb53ce457825136bb90d2c20fef0c154a28fae8b..c4a272714aa543367c59128a868f468e3e789263 100644 (file)
--- a/src/backend/access/nbtree/nbtdedup.c
+++ b/src/backend/access/nbtree/nbtdedup.c
@@ -65,7 +65,7 @@ _bt_dedup_one_page(Relation rel, Buffer buf, Relation heapRel,
    OffsetNumber deletable[MaxIndexTuplesPerPage];
    BTDedupState state;
    int         ndeletable = 0;
-   Size        pagesaving = 0;
+   Size        pagesaving PG_USED_FOR_ASSERTS_ONLY = 0;
    bool        singlevalstrat = false;
    int         nkeyatts = IndexRelationGetNumberOfKeyAttributes(rel);