[m-dev.] diff: add another regression test

[Thomas Charles CONWAY]

Fergus Henderson, you write:
> Estimated hours taken: 0.5
> 
> tests/hard_coded/Mmakefile:
> tests/hard_coded/var_not_found.m:
> tests/hard_coded/var_not_found.exp:
> 	Add a regression test for a mode analysis bug that resulted
> 	in a var_not_found error during code generation.
> 	I don't if the bug was ever fixed, it just happened to
> 	go away for some unknown reason.

IIRC, we diagnosed this bug as being some problem to do with complicated
unification predicates. Andrew, do you remember?

Thomas
-- 
Thomas Conway <conway at cs.mu.oz.au>
Nail here [] for new monitor.  )O+