[m-rev.] for post-commit review: fix a perf bug

[Zoltan Somogyi]

On Wed, 2 Dec 2015 18:02:24 +1100 (AEDT), Julien Fischer <jfischer at opturion.com> wrote:
> That's fine.  There are some other spots that also deal with init predicates,
> for example:
> 
>     deep_profiler/read_profile.m:743
>     runtime/mercury_layout_util.c:1030
>     runtime/mercury_stack_trace.c:2096
> 
> I don't know if you want remove those now or leave them.

I removed them, and a similar part of util/mdemangle.c.

Zoltan.