Fix compilation with 4.06, release.

CHANGES

@@ -1,3 +1,7 @@
+0.5.2 (07-10-2017)
+=====
+* Fix compilation with OCaml 4.06
+
 0.5.1 (11-04-2017)
 =====
 * Install .cmx files

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([ocaml-ogg],[0.5.1],[savonet-users@lists.sourceforge.net])
+AC_INIT([ocaml-ogg],[0.5.2],[savonet-users@lists.sourceforge.net])
 
 VERSION=$PACKAGE_VERSION
 AC_MSG_RESULT([configuring $PACKAGE_STRING])

src/ogg.ml

@@ -133,7 +133,7 @@ struct
       create (fun n -> 
                 let s = Bytes.create n in
                 let r = Unix.read fd s 0 n in
-                s,r),fd
+                Bytes.to_string s,r),fd
     with
       | e -> Unix.close fd; raise e
 

src/ogg_demuxer.ml

@@ -309,7 +309,7 @@ let unix_callbacks fd =
       (fun len ->
         let buf = Bytes.create len in
         let ret = Unix.read fd buf 0 len in
-        buf,ret);
+        Bytes.to_string buf,ret);
     tell = Some (fun () -> Unix.lseek fd 0 Unix.SEEK_CUR);
     seek = Some (fun len -> Unix.lseek fd len Unix.SEEK_SET) }