mktables: use master range list if inverse

mktables: use master range list if inverse

This patch subclasses the method that returns the range associated with
a table to instead return its complement's range.  This means that when
working on a table that is a complement, you are really working on its
complement.  This will be used in a future commit to avoid populating
the complement.

The base class has to change so that the method can be subclassed.