Ref/unref attached windows, avoids fusion error if window is released before event buffer.
Ref/unref attached windows, avoids fusion error if window is released before
event buffer.

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