Log Message:
-----------
Simplify assignment of Inf for pow Nan (don't worry about the sign).
Modified Files:
--------------
pgsql/src/backend/utils/adt:
float.c (r1.139 -> r1.140)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/float.c.diff?r1=1.139&r2=1.140)