[Cython] Minor bug: emitted junk line prevents compilation

[Nikita Nemkin]

Hi,

I believe I have found a bit of broken/junk code.
This line produces an unpaired and unnecessary #if directive:
https://github.com/cython/cython/blob/master/Cython/Compiler/ModuleNode.py#L2423
The fix is to simply remove it.

In case you are interested in how to hit this line, declare in some .pxd:

     cdef extern from "Python.h":
         ctypedef class __builtin__.BaseException [object  
PyBaseExceptionObject]:
             pass

and cimport it in another .pyx.

Best regards,
Nikita Nemkin