Fix PR#7 comparisons of recursive objects
Note that comparisons of deeply nested objects can still dump core in
extreme cases.
diff --git a/Include/object.h b/Include/object.h
index 77f5c55..fabf0b6 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -284,6 +284,9 @@
extern DL_IMPORT(int) Py_ReprEnter Py_PROTO((PyObject *));
extern DL_IMPORT(void) Py_ReprLeave Py_PROTO((PyObject *));
+/* tstate dict key for PyObject_Compare helper */
+extern PyObject *_PyCompareState_Key;
+
/* Flag bits for printing: */
#define Py_PRINT_RAW 1 /* No string quotes etc. */