Issue #25498: Fix GC crash due to ctypes objects wrapping a memoryview

This was a regression caused by revision 1da9630e9b7f.  Based on patch by
Eryksun.
diff --git a/Misc/ACKS b/Misc/ACKS
index abf7304..c9d69e2 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -391,6 +391,7 @@
 Stoffel Erasmus
 Jürgen A. Erhard
 Michael Ernst
+Eryksun
 Ben Escoto
 Andy Eskilsson
 André Espaze
diff --git a/Misc/NEWS b/Misc/NEWS
index 4e5ea19..aacd51e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -103,6 +103,10 @@
 Library
 -------
 
+- Issue #25498: Fix a crash when garbage-collecting ctypes objects created
+  by wrapping a memoryview.  This was a regression made in 3.4.3.  Based
+  on patch by Eryksun.
+
 - Issue #18010: Fix the pydoc web server's module search function to handle
   exceptions from importing packages.