convert: handle DSPF_A8 in dfb_pixel_from_color() and dfb_pixel_to_color()
convert: handle DSPF_A8 in dfb_pixel_from_color() and dfb_pixel_to_color()

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