Log Message:
-----------
Remove support of backward scan in GiST. Per discussion
http://archives.postgresql.org/pgsql-hackers/2008-10/msg00857.php
Modified Files:
--------------
pgsql/src/backend/access/gist:
gistget.c (r1.77 -> r1.78)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gistget.c?r1=1.77&r2=1.78)