Inlined heap_getattr().

src/backend/access/common/heaptuple.c

src/backend/access/common/heapvalid.c

src/backend/access/common/printtup.c

src/backend/access/index/indexam.c

src/backend/executor/execJunk.c

src/backend/executor/nodeUnique.c

src/include/access/heapam.h

src/include/access/heaptuple.h

src/include/storage/bufpage.h