Fix stack variable scope from previous commit.

The defect came from me, not from that commit's credited author.  Per
buildfarm members olingo and grassquit.

Discussion: https://postgr.es/m/20240903192030.1e@rfd.leadboat.com

diff --git a/contrib/pg_visibility/pg_visibility.c b/contrib/pg_visibility/pg_visibility.c
index 9975e8876e63077eb2328df3415ba890b6a77f86..db796e35cb2f8fd2e9b4678f9e282ffedac66178 100644 (file)
--- a/contrib/pg_visibility/pg_visibility.c
+++ b/contrib/pg_visibility/pg_visibility.c
@@ -490,6 +490,7 @@ collect_visibility_data(Oid relid, bool include_pd)
    BlockNumber blkno;
    Buffer      vmbuffer = InvalidBuffer;
    BufferAccessStrategy bstrategy = GetAccessStrategy(BAS_BULKREAD);
+   BlockRangeReadStreamPrivate p;
    ReadStream *stream = NULL;
 
    rel = relation_open(relid, AccessShareLock);
@@ -505,8 +506,6 @@ collect_visibility_data(Oid relid, bool include_pd)
    /* Create a stream if reading main fork. */
    if (include_pd)
    {
-       BlockRangeReadStreamPrivate p;
-
        p.current_blocknum = 0;
        p.last_exclusive = nblocks;
        stream = read_stream_begin_relation(READ_STREAM_FULL,