update for r94905: the proxy for `__iter__` must not rely on the object to...

update for r94905: the proxy for `__iter__` must not rely on the object to have an `__iter__` itself, but also support fall-back iteration via `__getitem__` (this fixes https://bugs.launchpad.net/zope2/+bug/360761)

src/Acquisition/_Acquisition.c

@@ -932,7 +932,7 @@ Wrapper_contains(Wrapper *self, PyObject *v)
 static PyObject * 
 Wrapper_iter(Wrapper *self)
 {
-  return CallMethodO(OBJECT(self), py__iter__, NULL, NULL); 
+  return PyObject_GetIter(self->obj);
 }
 
 static PySequenceMethods Wrapper_as_sequence = {

src/Acquisition/tests.py

@@ -1782,6 +1782,26 @@ def test_proxying():
     iterating...
     [42]
 
+    Finally let's check that https://bugs.launchpad.net/zope2/+bug/360761
+    has been fixed:
+
+    >>> class C(Acquisition.Implicit):
+    ...     l=[1,2,3]
+    ...     def __getitem__(self, i):
+    ...         return self.l[i]
+
+    >>> c1 = C()
+    >>> type(iter(c1))
+    <type 'iterator'>
+    >>> list(c1)
+    [1, 2, 3]
+
+    >>> c2 = C().__of__(c1)
+    >>> type(iter(c2))
+    <type 'iterator'>
+    >>> list(c2)
+    [1, 2, 3]
+
     """