build: fix warning
build: fix warning

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