made dat require pretty yo
Fixing a bug (well, maybe not a bug) where handing Where an empty array
would result in "myfield IN ()" and throw a SQL error when executed.
Instead, just return a false condition, since that is essentially what
the programmer intended (hopefully) when he passed an empty array.

Note that no test has been written for this, and the test suite not
run. I have a problem with the suite, but need the commit for now.