endless loop in compute_inverse bootstrapping on alpha

[Brad Lucier]

> I prefer my patch because it makes an explicit assumption -- that
> big-order pages can contain only one object -- verifies it, and then
> uses values which are safe and predictable.  And because it doesn't
> require the inverse_table to be bigger.

That's the patch that's tested at

http://gcc.gnu.org/ml/gcc-testresults/2002-08/msg00800.html

Brad