[m-rev.] for review: Store less-than-word-sized values in LSBs of box.

[Julien Fischer]

Hi Peter,

On Thu, 6 Jun 2019, Peter Wang wrote:

> runtime/mercury_heap.h:
>    Store less-than-word-sized values in least significant bits of a
>    box. This makes no any difference on little endian machines.
>    On big endian machines, affects the value printed out

     *it* affects

>    when the box is printed generically.

That looks fine otherwise.

Julien.