Update make-shareable-byte-vector for LW 5.1
Update make-shareable-byte-vector for LW 5.1

Patch courtesy of Chun Tian.

wesen/cffi,dkochmanski/cffi,cffi/cffi,stassats/cffi,dochang/cffi,3b/cffi,cffi/cffi,marsijanin/cffi,wesen/cffi,dkochmanski/cffi,kingcheez/cffi-cheez,attila-lendvai/cffi,akovalenko/cffi,attila-lendvai/cffi,kingcheez/cffi-cheez,akovalenko/cffi,dkochmanski/cffi,akovalenko/cffi,mcna/cffi,3b/cffi,marsijanin/cffi,dochang/cffi,mcna/cffi,wesen/cffi,marsijanin/cffi,cffi/cffi,kingcheez/cffi-cheez,stassats/cffi,dochang/cffi,3b/cffi,stassats/cffi