[COMMITTERS] pgsql: Fix comment typo.

[Bruce Momjian]

Log Message:
-----------
Fix comment typo.

Modified Files:
--------------
    pgsql/src/backend/access/transam:
        xlog.c (r1.186 -> r1.187)
        
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c.diff?r1=1.186&r2=1.187)

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