From c6ad6e3499cca209506462b0b7b8dc73c43bc568 Mon Sep 17 00:00:00 2001
From: tzutalin <tzu.ta.lin@gmail.com>
Date: Wed, 3 May 2017 16:53:55 +0800
Subject: [PATCH] Fix build error for qt3

---
 labelImg.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/labelImg.py b/labelImg.py
index 1834f21d..b8073c54 100644
--- a/labelImg.py
+++ b/labelImg.py
@@ -418,7 +418,7 @@ class MainWindow(QMainWindow, WindowMixin):
         self.move(position)
         saveDir = ustr(settings.get('savedir', None))
         self.lastOpenDir = ustr(settings.get('lastOpenDir', None))
-        if os.path.exists(saveDir):
+        if saveDir is not None and os.path.exists(saveDir):
             self.defaultSaveDir = saveDir
             self.statusBar().showMessage('%s started. Annotation will be saved to %s' %
                                          (__appname__, self.defaultSaveDir))