handle empty blocks in s-parser
handle empty blocks in s-parser

WebAssembly/binaryen,ddcc/binaryen,WebAssembly/binaryen,ddcc/binaryen,yurydelendik/binaryen,ddcc/binaryen,WebAssembly/binaryen,ddcc/binaryen,yurydelendik/binaryen,WebAssembly/binaryen,ddcc/binaryen,yurydelendik/binaryen,yurydelendik/binaryen,WebAssembly/binaryen,yurydelendik/binaryen