message: Fix q18 result query
diff: template benchmark/clickbench/clickbench-noresult.benchmark.in
  QUERY_NUMBER=18
  QUERY_NUMBER_PADDED=18
  -RESULT_QUERY=SELECT COUNT(*) AS count FROM (SELECT * FROM __answer GROUP BY UserID, SearchPhrase)
  +RESULT_QUERY=SELECT COUNT(*) AS count FROM (SELECT UserID, SearchPhrase FROM __answer GROUP BY UserID, SearchPhrase) t
  