[Cocci] "TODO: FunCall" in python match printing

[Julia Lawall]

> > For some other files, the warning is different:
> > (ONCE) ast_to_flow: filter a directive
> 
> Ok, this one is mine ... it tells you that the engine
> will not represent some cpp directive like #ifdef or #define instructions
> in the internal structure of coccinelle. You should not be concerned
> by that, it's mainly for the developer of coccinelle.
> 
> (Julia, maybe we can do pr2_developer/pr2_user ? or maybe just put
> those pr2 behind a flag).

Still the user might be interested to know that some #defines are not 
being treated.  Although the message is not very helpful...

julia