build: fix warnings
build: fix warnings

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