Eliminated flashing shell prompt under windows.
Eliminated flashing shell prompt under windows.

original commit: f642e5abc98afb79702a62214f039a8a6dacc9a6

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