slide timeout advance as low-priority callback, to avoid thrashing when the last registered slide has a timeout
slide timeout advance as low-priority callback, to avoid thrashing when the last registered slide has a timeout

svn: r7439

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket