Bug#702349: lintian should not complain about hardening for package written in pure Ocaml

[Hendrik Tews <tews@os.inf.tu-dresden.de>]

   OCaml has a built-in notion of "unsafe" feature (see ocamlobjinfo
   output) that could serve as a starting point for that.
   
Yes, I tried this on 

    let f b =
      let a = "abcde" in
      let c = Obj.magic b in
      String.unsafe_blit c 0 a 0 5

For the .cmo, ocamlobjinfo surprisingly reports

   Uses unsafe features: no

and for the .cmx it doesn't say anything about unsafe features.

Bye,

Hendrik