Log Message:
-----------
Attempt to return proper overflow/underflow messages for platforms that
only return Nan and set errno for pow/exp overflow/underflow.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
float.c (r1.136 -> r1.137)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/float.c.diff?r1=1.136&r2=1.137)