[layer] rotation: update can be 0, e.g. frontonly-exclusive getsurface.
[layer] rotation: update can be 0, e.g. frontonly-exclusive getsurface.

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