pgsql: Adjust network errmsg("result is out of range") message to be

Log Message:
-----------
Adjust network errmsg("result is out of range") message to be consistent
with other places.

Modified Files:
--------------
pgsql/src/backend/utils/adt:
network.c (r1.66 -> r1.67)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/network.c.diff?r1=1.66&r2=1.67)