[m-dev.] diff: fix bug in tests/valid/intermod_user_equality*2.m

[Fergus Henderson]

I wrote:

> (B1) XXX intermodule optimization #include/dependency problems
...
> valid/intermod_user_equality: B1
> valid/intermod_user_equality_nested: B1

It turns out I had misinterpreted the cause of that test case
failure.  It was actually failing due to a determinism error
in the test case.  That of course raises another question: why wasn't
it failing for the LLDS back-end?  The reason is that the determinism
error was in a part of the test case which the LLDS back-end didn't
compile, but which the MLDS back-end did.

Anyhow, here's the fix.

----------

Estimated hours taken: 1

tests/valid/intermod_user_equality2.m:
tests/valid/intermod_user_equality_nested2.m:
	Fix a bug in these test cases that caused a compile error
	("unification for non-canonical type is not guaranteed to succeed")
	when building things in MLDS grades.  For the LLDS back-end,
	these modules weren't being compiled, only the modules that
	import them were being compiled; but for the MLDS back-end,
	compiling the latter to `.o' requires generating the header
	files for the former, and generating the header files requires
	compilation.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
PGP: finger fjh at 128.250.37.3        |     -- the last words of T. S. Garp.
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