Fixed incorrect use of sap-ref-word for longs on 64-bit Windows.
Fixed incorrect use of sap-ref-word for longs on 64-bit Windows.

Implemented automatic accessor lookup for integer types, based on
alien type size and CFFI keyword -> alien type mapping.

* src/cffi-sbcl.lisp (define-type-mapping): new macro.

akovalenko/cffi,akovalenko/cffi,akovalenko/cffi