Improved test-hdbc-postgres error message.
Improved test-hdbc-postgres error message.

Ignore-this: 5360bd84e009dde1917c429d56698db

Test program now complains when no arguments are given.

darcs-hash:20100716164346-447ee-06e5ab3fa949276f6f3396b147effaa13198add7.gz

m4dc4p/haskelldb