[Cython] new idea for typedef integrals

As posted some time ago, here you have some work (BTW, awaiting
review) http://trac.cython.org/cython_trac/ticket/333

But recently I was thinking on something... What about a parser
modification to accept code like the below one?:

cdef extern from *: # note the "?" annotation
    ctypedef singed MyIntType1?
    ctypedef singed MyIntType2? "something"

Perhaps the uses knows that some typedef ACTUALLY match the extern
one. And then, we should not second-guess the user.

Moreover, this is fully backwards... The new unknow-size handling code
will only be used if a typedef is explicitly marked as an unknow-size
type.

What do you think?

--

-- 
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
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