bizgres - bizgres: Make bmcostestimate call genericcostestimate again,

Log Message:
-----------
Make bmcostestimate call genericcostestimate again, it had been #if'ed out
during the merge.

Modified Files:
--------------
bizgres/postgresql/src/backend/utils/adt:
selfuncs.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/utils/adt/selfuncs.c.diff?r1=1.5&r2=1.6)