Screen registration was missing from system_join().
Screen registration was missing from system_join().

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