GP2D: Enable blending when destination has no alpha. Fix font rendering.
GP2D: Enable blending when destination has no alpha. Fix font rendering.

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