make hashes always the size of pointers; introduce Py_hash_t #9778
diff --git a/Include/weakrefobject.h b/Include/weakrefobject.h
index f15c9d9c..b201d08 100644
--- a/Include/weakrefobject.h
+++ b/Include/weakrefobject.h
@@ -27,7 +27,7 @@
     /* A cache for wr_object's hash code.  As usual for hashes, this is -1
      * if the hash code isn't known yet.
      */
-    long hash;
+    Py_hash_t hash;
 
     /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL-
      * terminated list of weak references to it.  These are the list pointers.