Treat windows with color keying enabled as transparent, so the background gets cleared.
Treat windows with color keying enabled as transparent, so the background
gets cleared.

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