Add a hack so that ifnull returns true on undefined.
Add a hack so that ifnull returns true on undefined.

The proper way to fix that is to chase down all the undefined things so we don't encounter them.

cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp