Update code to be compatible with Ocaml 4.13.1 - #22

Update code to be compatible with Ocaml 4.13.1#22

yashrk wants to merge 4 commits into

cedlemo:mastercedlemo/OCaml-libmpdclient:masterfrom

yashrk:ocaml-4.13.1yashrk/OCaml-libmpdclient:ocaml-4.13.1Copy head branch name to clipboard