fix compilation for 4.02
fix compilation for 4.02

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