Move the set search finger before the smalltable.

Include/setobject.h

@@ -57,9 +57,9 @@ typedef struct {
      */
     setentry *table;
     Py_hash_t hash;             /* Only used by frozenset objects */
-    setentry smalltable[PySet_MINSIZE];
-
     Py_ssize_t finger;          /* Search finger for pop() */
+
+    setentry smalltable[PySet_MINSIZE];
     PyObject *weakreflist;      /* List of weak references */
 } PySetObject;