direct: Add D_UNUSED(param) macro for cancelling compiler warnings.
direct: Add D_UNUSED(param) macro for cancelling compiler warnings.

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