Hello,

libprelude 1.0.1 does not compile on ruby1.9. I did some patching work in order to compile it.
However, I do not have a testcase to do a functional test.

I also changed the IDMEFValueList_to_SWIG logic to use ruby function in order to store values
into a RARRAY and not by changing internal RARRAY fields. I don't think that dealing with internal
RARRAY fields is a good idea and it is proved to not be portable across ruby versions. The same for
_cb_ruby_read/write.

I'll attack my patch. Feel free to apply it.