GMP bug

[Torbjorn Granlund]

We have discovered a bug in mpn/generic/dcpi1_bdiv_q.c that is quite
unpleasant.  It causes invalid computation, but with very low
probability (for uniformly distributed random operands).  Please see
http://gmplib.org/#STATUS for more information.

This will warrant a 5.0.3 release.

The bug was discovered by our automated tests, which use new random test
vectors each night.

-- 
Torbjörn