Log Message:-----------Add comments about why errno is set to zero.
Modified Files:-------------- pgsql/src/backend/utils/adt: datetime.c (r1.162 -> r1.163) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c.diff?r1=1.162&r2=1.163) float.c (r1.116 -> r1.117) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/float.c.diff?r1=1.116&r2=1.117)