make hashes always the size of pointers; introduce Py_hash_t #9778
diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index f43b68d..7a2c1bd 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -139,7 +139,7 @@
 }
 
 
-static long
+static Py_hash_t
 weakref_hash(PyWeakReference *self)
 {
     if (self->hash != -1)