fix compiler/zo-parse for sequence splice
fix compiler/zo-parse for sequence splice

Merge to 5.1.2

original commit: 42f41d868a133751722a426467168005d8cfb0ef

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