Log Message:
-----------
Fix longstanding bug found by Atsushi Ogawa: _bt_check_unique would mark
the wrong buffer dirty when trying to kill a dead index entry that's on
a page after the one it started on. No risk of data corruption, just
inefficiency, but still a bug.
Modified Files:
--------------
pgsql/src/backend/access/nbtree:
nbtinsert.c (r1.125 -> r1.126)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/nbtree/nbtinsert.c.diff?r1=1.125&r2=1.126)