SaWMan: Fix dual source blit arguments for intersections of windows.
SaWMan: Fix dual source blit arguments for intersections of windows.

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