./configure --enable-zero

[Gary Benson]

Hi all,

My last commit should allow you to use the zero-assembler port on
x86 and x86_64 by starting your build with ./configure --enable-zero.
It ought to work, but I haven't been able to test it because I don't
have an x86_64 machine handy and when I tried it on an i686 g++
printed a screenful of lisp and bombed out which I presume was it's
way of saying "compiler error".  So YMMV...

Cheers,
Gary