Type object for opaque initialized with PyType_Clear.

opaque is registered only if not another module has already registered
a conversion for that pointer type.
Doc update.


[SVN r35104]

libs/python

@@ -1 +1 @@
-Subproject commit 567a2c7b89d99baf20cff5799c5f23048b7ec4a9
+Subproject commit 2610eb9acb04ad3902654202254d047802923de7