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 6401fce57b91ef38fc4e09b175c831078f26d754..1cd1b59ec35b21ab95d134771cfe59e0766f9604 100644 (file)
--- a/src/backend/access/nbtree/nbtdedup.c
+++ b/src/backend/access/nbtree/nbtdedup.c
@@ -64,7 +64,7 @@ _bt_dedup_pass(Relation rel, Buffer buf, Relation heapRel, IndexTuple newitem,
    BTPageOpaque opaque = (BTPageOpaque) PageGetSpecialPointer(page);
    Page        newpage;
    BTDedupState state;
-   Size        pagesaving = 0;
+   Size        pagesaving PG_USED_FOR_ASSERTS_ONLY = 0;
    bool        singlevalstrat = false;
    int         nkeyatts = IndexRelationGetNumberOfKeyAttributes(rel);