A question about fill_free_list(void) function

[Pedram]

Oh... I got it! :)
I found this line in ctypes.h:
#define Py_TYPE(q) = ((PyObject *)(q))->ob_next;
So those lines are trying to set the blocks type from rear to front.

But I still don't know why after the while (when q is equal to p), the
Py_TYPE(q) set to NULL!