Wisconsin benchmark

The Wisconsin Benchmark in src/test/bench is broken, probably since 8.2.

Attached is a tested patch that fixes it. However, it might be better
to just remove src/test/bench. The benchmark is quite useless,
because it is single user test that runs in the stand
alone mode, and because it is laughably small, taking just a couple
seconds on a 6 year old not-all-that good machine. And it doesn't
seem to be all that faithful to the Wisconsin Benchmark, as the string
fields are only 6 characters rather than 42 (I think) of the
benchmark.

Cheers,

Jeff