Refactor [module|capi]_ac_inner

* The usual tabs/spaces/indent stuff.
* Make use of the fact that __new__ ensures that self->obj is never NULL

src/Acquisition/_Acquisition.c

@@ -1826,36 +1826,20 @@ module_aq_self(PyObject *ignored, PyObject *self)
 static PyObject *
 capi_aq_inner(PyObject *self)
 {
-  PyObject *result;
-  if (! isWrapper(self)) 
-    {
-      Py_INCREF(self);
-      return self;
-    }
-
-  if (WRAPPER(self)->obj)
-    {
-      result=WRAPPER(self)->obj;
-      while (isWrapper(result) && WRAPPER(result)->obj) 
-	{
-	  self=result;
-	  result=WRAPPER(result)->obj;
-	}
-      result=self;
+    if (isWrapper(self)) {
+        while (isWrapper(WRAPPER(self)->obj)) {
+            self = WRAPPER(self)->obj;
+        }
     }
-  else result=Py_None;
 
-  Py_INCREF(result);
-  return result;
+    Py_INCREF(self);
+    return self;
 }
 
 static PyObject *
-module_aq_inner(PyObject *ignored, PyObject *args)
+module_aq_inner(PyObject *ignored, PyObject *self)
 {
-  PyObject *self;
-
-  UNLESS (PyArg_ParseTuple(args, "O", &self)) return NULL;
-  return capi_aq_inner(self);
+    return capi_aq_inner(self);
 }
 
 static PyObject *
@@ -1991,7 +1975,7 @@ static struct PyMethodDef methods[] = {
    "aq_parent(ob) -- Get the parent of an object"},
   {"aq_self", (PyCFunction)module_aq_self, METH_O,
    "aq_self(ob) -- Get the object with the outermost wrapper removed"},
-  {"aq_inner", (PyCFunction)module_aq_inner, METH_VARARGS, 
+  {"aq_inner", (PyCFunction)module_aq_inner, METH_O,
    "aq_inner(ob) -- "
    "Get the object with all but the innermost wrapper removed"},
   {"aq_chain", (PyCFunction)module_aq_chain, METH_VARARGS,