From 20b08561add01d4865bb82ec8c9ac6ca1c79922b Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Mon, 18 Sep 2017 12:37:41 +0200
Subject: [PATCH] set default value of thrid parameter to None in
 SeletionGatePython

---
 src/Gui/SelectionFilter.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Gui/SelectionFilter.cpp b/src/Gui/SelectionFilter.cpp
index 10e2c47cea..a2fc8cc1fc 100644
--- a/src/Gui/SelectionFilter.cpp
+++ b/src/Gui/SelectionFilter.cpp
@@ -91,9 +91,9 @@ bool SelectionGatePython::allow(App::Document* doc, App::DocumentObject* obj, co
             Py::Callable method(this->gate.getAttr(std::string("allow")));
             Py::Object pyDoc = Py::asObject(doc->getPyObject());
             Py::Object pyObj = Py::asObject(obj->getPyObject());
-            Py::String pySub;
+            Py::Object pySub = Py::None();
             if (sub)
-                pySub = std::string(sub);
+                pySub = Py::String(sub);
             Py::Tuple args(3);
             args.setItem(0, pyDoc);
             args.setItem(1, pyObj);