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)
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