Fix compiler warnings about unused variables, caused by my previous commit.

Reported by Peter Eisentraut.

Branch
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REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/3d975d0fc5d7fd28839e3cf1871a479bfc0bcd28

Modified Files
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src/backend/access/transam/xlog.c |    3 ---
1 files changed, 0 insertions(+), 3 deletions(-)

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