Don't overwrite retcode after it has been assigned an error code (https://github.com/tbuktu/libntru/issues/20)
Don't overwrite retcode after it has been assigned an error code (https://github.com/tbuktu/libntru/issues/20)

iblumenfeld/libntru,jquesnelle/libntru,jl777/libntru,jl777/libntru,jl777/libntru,jquesnelle/libntru,iblumenfeld/libntru,jquesnelle/libntru,iblumenfeld/libntru