fix another warning
fix another warning

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