Log Message:-----------Fix some typos.
Modified Files:-------------- pgsql/src/backend/utils/mmgr: mcxt.c (r1.51 -> r1.52) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/mcxt.c.diff?r1=1.51&r2=1.52) pgsql/src/port: dirmod.c (r1.28 -> r1.29) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/dirmod.c.diff?r1=1.28&r2=1.29)