Fix 'old-protocol' frontend under Windows
Fix 'old-protocol' frontend under Windows

ocaml/merlin,ocaml/merlin,rgrinberg/merlin,rgrinberg/merlin,the-lambda-church/merlin,dra27/merlin,ocaml/merlin,rgrinberg/merlin,ocaml/merlin,the-lambda-church/merlin,dra27/merlin,rgrinberg/merlin,dra27/merlin,dra27/merlin,the-lambda-church/merlin