bpo-41654: Fix compiler warning in MemoryError_dealloc() (GH-22387) (GH-24894)

Fix warning:

Objects\exceptions.c(2324,56): warning C4098:
'MemoryError_dealloc': 'void' function returning a value
(cherry picked from commit bbeb223)

Co-authored-by: Victor Stinner <[email protected]>

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Objects/exceptions.c

@@ -2310,7 +2310,8 @@ MemoryError_dealloc(PyBaseExceptionObject *self)
     BaseException_clear(self);
 
     if (!Py_IS_TYPE(self, (PyTypeObject *) PyExc_MemoryError)) {
-        return Py_TYPE(self)->tp_free((PyObject *)self);
+        Py_TYPE(self)->tp_free((PyObject *)self);
+        return;
     }
 
     _PyObject_GC_UNTRACK(self);