Compatibility and warning for drivers still using state->modified.
Compatibility and warning for drivers still using state->modified.

Every SetState() call will be made with modified = SMF_ALL. Afterwards
the value is checked (warn if changed) and reset to 0.

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