ledit fails to build with 3.09.0, camlp4 antiquotations and missing _loc ...

[Sven Luther <sven.luther@wanadoo.fr>]

Hello,

Well, my first test of building something with ocaml 3.09.0 failed, namely
ledit, due to some obscure camlp4 magic :

  camlp4r pa_extend.cmo q_MLast.cmo pa_local.ml -o pa_local.ppo
  File "", line 34, characters 13-65:
  use of antiquotation syntax deprecated since version 3.06+18
  ocamlc -I `camlp4 -where` -c -impl pa_local.ppo
  File "pa_local.ml", line 19, characters 0-1:
  Unbound value _loc
  make: *** [pa_local.cmo] Error 2

It would be nice if someone with camlp4 knowledge could have a look.

Friendly,

Sven Luther