Merge in the new GIL.
diff --git a/Include/pystate.h b/Include/pystate.h
index e02df88..c27e827 100644
--- a/Include/pystate.h
+++ b/Include/pystate.h
@@ -88,6 +88,8 @@
 
     PyObject *dict;  /* Stores per-thread state */
 
+    /* XXX doesn't mean anything anymore (the comment below is obsolete)
+       => deprecate or remove? */
     /* tick_counter is incremented whenever the check_interval ticker
      * reaches zero. The purpose is to give a useful measure of the number
      * of interpreted bytecode instructions in a given thread.  This