[x11] Set buffer lock offset in fallback mode to satisfy assumption in surface core.
[x11] Set buffer lock offset in fallback mode to satisfy assumption in surface core.

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