From fea534509ee514bcf222100785bfc3f8ef90e43a Mon Sep 17 00:00:00 2001
From: fieldOfView <aldo@fieldofview.com>
Date: Fri, 1 Jul 2016 10:12:11 +0200
Subject: [PATCH] Fix two "critical errors" on startup

CuraMachineManager.isGlobalStackValid would return None on startup, which qml does not like.

CURA-1585
---
 cura/MachineManagerModel.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cura/MachineManagerModel.py b/cura/MachineManagerModel.py
index 43b4ab521d..76786efe61 100644
--- a/cura/MachineManagerModel.py
+++ b/cura/MachineManagerModel.py
@@ -213,7 +213,7 @@ class MachineManagerModel(QObject):
     #   Calling _checkStackForErrors on every change is simply too expensive
     @pyqtProperty(bool, notify = globalValidationChanged)
     def isGlobalStackValid(self):
-        return self._global_stack_valid
+        return bool(self._global_stack_valid)
 
     @pyqtProperty(str, notify = activeStackChanged)
     def activeUserProfileId(self):