Add empty case for with-contract's clause for free variable contracts.
Add empty case for with-contract's clause for free variable contracts.

Also reorder the single and multiple cases to match result-spec's ordering.

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