Fix problem when entering size without an object selected.

diff --git a/Cura/gui/sceneView.py b/Cura/gui/sceneView.py
index 7a1fc5bfc3908418eae4261e002de3535b89da43..5ba9e9b465a1b5f1875018c70e73687ac2918ea3 100644 (file)
--- a/Cura/gui/sceneView.py
+++ b/Cura/gui/sceneView.py
@@ -227,6 +227,8 @@ class SceneView(openglGui.glGuiPanel):
                self.sceneUpdated()
 
        def OnScaleEntryMM(self, value, axis):
+               if self._selectedObj is None:
+                       return
                try:
                        value = float(value)
                except: