Log Message:
-----------
Assertion issues with shrink_memtuples solved.
Modified Files:
--------------
bizgres/postgresql/src/backend/utils/sort:
tuplesort.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/utils/sort/tuplesort.c.diff?r1=1.4&r2=1.5)