reference leak when 'continue' appear in a loop's 'else' branch

[scoder]

The following leaks references to 'L' when executing the 'continue' statement:

def for_in():
    """
    >>> for_in()
    6
    """
    i = -1
    for L in [[], range(5), range(10)]:
        for i in L:
            if i > 5:
                break
        else:
            continue
        break
    return i

[scoder]

Fixed here:

 http://hg.cython.org/cython-devel/rev/879bb33c11c9