Added macro SET_ALPHA_PIXEL_DUFFS_DEVICE() which implements Duff's device with a depth of 8. Use it for all but the RGB24 Bop_a8_set_alphapixel_Aop_* functions.
Added macro SET_ALPHA_PIXEL_DUFFS_DEVICE() which implements Duff's
device with a depth of 8. Use it for all but the RGB24
Bop_a8_set_alphapixel_Aop_* functions.

Undefined the SET_ALPHA_PIXEL_* macros after usage and removed lots of
unneeded brackets.

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