[m-rev.] diff: Make most_specific_rval handle mkword_hole.

[Julien Fischer]

Hi Peter,

On Wed, 22 May 2013, Peter Wang wrote:

> dupelim.most_specific_rval did not handle the `mkword_hole' option that
> was added to the `rval' type.
>
> compiler/dupelim.m:
> 	Fix the bug.
>
> tests/valid/Mmakefile:
> tests/valid/dupelim_mkword_hole.m:
> 	Add test case.

Can you commit this on the 13.05 branch as well.

Cheers,
Julien.