get useful checks from tricks/code-checker/code-checker.php

All of the tests are already in coder except for the following:

1. Check that "INSERT INTO" statements have at least one set of "(...)" following - I guess this could be seen as an ANSI SQL test, for example it's possible to use "INSERT INTO foo SET a='abc';" in MySQL, but it's not part of the ANSI SQL standard.
2. Check that "INSERT INTO" statements have two "(...)" following, i.e. one containing list of column names and the other the values. I don't believe this is invalid SQL and (iirc) it's not a recommendation in the drupal SQL standards, but personally I would prefer this more explicit method of inserts.
3. Check that the number of values matches the number of column names in all INSERTs - I don't think there is an easy way of implementing this in coder (could be wrong) but the database will throw an error in such instances and the code won't work.

Cheers,
Stella