yet another problem in recent builds, GIST this time

I think I have another problem similar to what I just reported. This time it is in GiST. It does not complain when it
buildsthe index but any attempt to use the table with exesisting GiST indices causes this error: 

emp=> select count(*) from pho;
ERROR:  index_info: no amop 783 18630 1

--Gene