Changes required so that access/* compiles cleanly...

src/backend/access/hash/hash.c

src/backend/access/hash/hashinsert.c

src/backend/access/hash/hashovfl.c

src/backend/access/hash/hashpage.c

src/backend/access/hash/hashscan.c

src/backend/access/hash/hashsearch.c

src/backend/access/hash/hashstrat.c

src/backend/access/hash/hashutil.c

src/backend/access/heap/heapam.c

src/backend/access/heap/hio.c

src/backend/access/heap/stats.c

src/backend/access/index/genam.c

src/backend/access/nbtree/nbtinsert.c

src/backend/access/nbtree/nbtpage.c

src/backend/access/nbtree/nbtree.c

src/backend/access/nbtree/nbtsearch.c

src/backend/access/nbtree/nbtsort.c

src/backend/access/nbtree/nbtutils.c

src/backend/access/rtree/rtree.c