Log Message:-----------Reduce unnecessary PANIC to ERROR, improve a couple of comments.
Modified Files:-------------- pgsql/src/backend/access/transam: xlog.c (r1.309 -> r1.310) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c?r1=1.309&r2=1.310)
