Thanks Martin, change has been made in the cffi-libffi branch.  Unfortunately, this will not make its way into Quicklisp until CFFI does the next release (which I hope is soon).

Liam

On Mon, Dec 17, 2012 at 10:32 AM, Martin Simmons <martin@lispworks.com> wrote:
+              #+(or ccl lispworks) (not (subtypep element-type 'complex))