[convert] Fix missing parentheses around macro parameters in YCBCR_TO_RGB().
[convert] Fix missing parentheses around macro parameters in YCBCR_TO_RGB().

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