Silence another _bt_check_unique compiler warning.

Per complaint from Tom Lane

Discussion: https://postgr.es/m/1922884.1617909599@sss.pgh.pa.us

diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c
index 0bc86943ebc550d5b191badc24511a8d2107e1ec..6ac205c98ee8e8147e75f32b13ed07a44d38049f 100644 (file)
--- a/src/backend/access/nbtree/nbtinsert.c
+++ b/src/backend/access/nbtree/nbtinsert.c
@@ -408,7 +408,7 @@ _bt_check_unique(Relation rel, BTInsertState insertstate, Relation heapRel,
 {
        IndexTuple      itup = insertstate->itup;
        IndexTuple      curitup = NULL;
-       ItemId          curitemid;
+       ItemId          curitemid = NULL;
        BTScanInsert itup_key = insertstate->itup_key;
        SnapshotData SnapshotDirty;
        OffsetNumber offset;