[Cython] Class scope lookup order

[Vitja Makarov]

When creating python-class dict it seems that CPython first looks at
dict then at globals:

A = 1
class X:
    A = A

def y():
    A = 3
    class Y:
        A = A
    return Y
Y = y()

print(X.A, Y.A)

Will print: 1, 1
And not: 1, 3

I didn't find documentation for this but if I'm correct that should be
easy to fix issue in Cython.

Now for this code cython reports compile-time error: local variable
referenced before assignment


-- 
vitja.