use unsafe struct accessors and pair ops (using #%unsafe, because going throught scheme/unsafe/ops will lead to a cycle)
use unsafe struct accessors and pair ops (using #%unsafe, because going throught scheme/unsafe/ops will lead to a cycle)

svn: r16744

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