Attached is a new patch which addresses this problem. (oids in

doc/src/sgml/inherit.sgml

src/backend/access/common/heaptuple.c

src/backend/access/heap/heapam.c

src/backend/catalog/heap.c

src/backend/parser/parse_relation.c

src/backend/utils/cache/lsyscache.c

src/include/access/heapam.h

src/include/access/htup.h

src/include/catalog/pg_attribute.h

src/test/regress/expected/inherit.out

src/test/regress/sql/inherit.sql

src/tools/make_mkid