Fix compilation of MMX on x86-64.
Fix compilation of MMX on x86-64.

kevleyski/directfb,dfbdok/DirectFB1,Distrotech/DirectFB,lancebaiyouview/DirectFB,DirectFB/directfb,kaostao/directfb,mtsekm/test,lancebaiyouview/DirectFB,kevleyski/directfb,deniskropp/DirectFB,jcdubois/DirectFB,lancebaiyouview/DirectFB,dfbdok/DirectFB1,deniskropp/DirectFB,Distrotech/DirectFB,sklnet/DirectFB,kevleyski/directfb,dfbdok/DirectFB1,sklnet/DirectFB,sklnet/DirectFB,mtsekm/test,DirectFB/directfb,Distrotech/DirectFB,kevleyski/directfb,djbclark/directfb-core-DirectFB,kevleyski/DirectFB-1,kaostao/directfb,deniskropp/DirectFB,kevleyski/DirectFB-1,kaostao/directfb,kevleyski/DirectFB-1,lancebaiyouview/DirectFB,DirectFB/directfb,mtsekm/test,djbclark/directfb-core-DirectFB,jcdubois/DirectFB,djbclark/directfb-core-DirectFB,sklnet/DirectFB,jcdubois/DirectFB,deniskropp/DirectFB,djbclark/directfb-core-DirectFB,kevleyski/DirectFB-1