[Cython] Speed up cython for enum declarations

[Stefan Behnel]

Hi,

David Cournapeau wrote:
> I managed to get a quite short code snippet: it crashes on an empty
> file :) It also crashes on a trivial file (to make sure the empty file
> itself was not the issue)

It still doesn't crash for an empty file, but I get it to crash on this:

	print "test"

I'll look into this.

Stefan