Pass heaprel to GlobalVisTestFor() in vacuumRedirectAndPlaceholder()

[Drouvot, Bertrand]

hi hackers,

now that the heap relation is passed down to vacuumRedirectAndPlaceholder()
thanks to 61b313e47e, we can also pass it down to GlobalVisTestFor() too (to
allow more pruning).

Please find attached a tiny patch to do so.

Regards,

--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com
diff --git a/src/backend/access/spgist/spgvacuum.c 
b/src/backend/access/spgist/spgvacuum.c
index 3cff71e720..5a7e55441b 100644
--- a/src/backend/access/spgist/spgvacuum.c
+++ b/src/backend/access/spgist/spgvacuum.c
@@ -506,8 +506,7 @@ vacuumRedirectAndPlaceholder(Relation index, Relation 
heaprel, Buffer buffer)
        xlrec.nToPlaceholder = 0;
        xlrec.snapshotConflictHorizon = InvalidTransactionId;
 
-       /* XXX: providing heap relation would allow more pruning */
-       vistest = GlobalVisTestFor(NULL);
+       vistest = GlobalVisTestFor(heaprel);
 
        START_CRIT_SECTION();