Don't return a bitmask but a real boolean value in dfb_gfxcard_state_check().
Don't return a bitmask but a real boolean value in dfb_gfxcard_state_check().

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