	* port.lisp (*double-buffering-p*): By default, enable double         buffering only on Windows.
	* port.lisp (*double-buffering-p*): By default, enable double
        buffering only on Windows.

antifuchs/mcclim,onixie/mcclim,swflint/McCLIM,antifuchs/mcclim,slyrus/mcclim,onixie/mcclim,swflint/McCLIM,slyrus/mcclim,onixie/mcclim,swflint/McCLIM