Small camlp4 changes for ocaml 3.12
Small camlp4 changes for ocaml 3.12

Ignore-this: 23de0612c19e8eb38c6e208530967450

darcs-hash:20101015144841-d3a77-261b07178e90813bca48dba095cb8625ce08381f

mfp/ocsigenserver,mfp/ocsigenserver