Log Message:
-----------
Improve our private implementation of cbrt() to give results of the
accuracy expected by the regression tests. Per suggestion from
Martijn van Oosterhout.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
float.c (r1.123 -> r1.124)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/float.c.diff?r1=1.123&r2=1.124)