Use Py_ssize_t for _Py_RefTotal.
I tried to handle Win64 properly, but please review.
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 3219b1c..a33ac26 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -604,7 +604,7 @@
 static PyObject *
 sys_gettotalrefcount(PyObject *self)
 {
-	return PyInt_FromLong(_Py_RefTotal);
+	return PyInt_FromSsize_t(_Py_RefTotal);
 }
 
 #endif /* Py_TRACE_REFS */