--- a/controls/LogViewer.py	Sat Apr 14 10:09:33 2018 +0200
+++ b/controls/LogViewer.py	Mon Apr 16 11:00:04 2018 +0200
@@ -396,7 +396,7 @@
         self.HasNewData = False
 
     def SetLogSource(self, log_source):
-        self.LogSource = proxy(log_source) if log_source else None
+        self.LogSource = proxy(log_source) if log_source is not None else None
         self.CleanButton.Enable(self.LogSource is not None)
         if log_source is not None:
             self.ResetLogMessages()