python: Stop using the safe_malloc, etc. functions.

python/guestfs-py-byhand.c

@@ -75,6 +75,8 @@ guestfs_int_py_close (PyObject *self, PyObject *args)
    * in a double-free here.  XXX
    */
   callbacks = get_all_event_callbacks (g, &len);
+  if (callbacks == NULL)
+    return NULL;
 
   if (PyEval_ThreadsInitialized ())
     py_save = PyEval_SaveThread ();
@@ -251,7 +253,11 @@ get_all_event_callbacks (guestfs_h *g, size_t *len_rtn)
   }
 
   /* Copy them into the return array. */
-  r = guestfs_int_safe_malloc (g, sizeof (PyObject *) * (*len_rtn));
+  r = malloc (sizeof (PyObject *) * (*len_rtn));
+  if (r == NULL) {
+    PyErr_SetNone (PyExc_MemoryError);
+    return NULL;
+  }
 
   i = 0;
   cb = guestfs_first_private (g, &key);