Fix memory leak (https://github.com/tbuktu/libntru/issues/15)
Fix memory leak (https://github.com/tbuktu/libntru/issues/15)

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