Added an assumption to D_MAGIC_SET that the magic value is not set already.
Added an assumption to D_MAGIC_SET that the magic value is not set already.

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