[tex-live] kpsewhich can't find mpost.mem

[Akira Kakuto]

Hi Elie,

> kpsewhich -format mem -must-exist mpost.mem

In TL 2008, you have to input engine name:
kpsewhich --engine=metapost --format=mem mpost.mem

This change was made in TL 2008 in order to forbid
to read a wrong format.

Best,
Akira