Minor bugfix when trying to save a model with no scene

Connectors.py

@@ -242,6 +242,8 @@ class Channel(Connection):
         super(Channel, self).__init__(process, process)
         self.label_in = QGraphicsTextItem('[]', parent=self)
         self.label_out = QGraphicsTextItem('[]', parent=self)
+        #self.label_in.setTextInteractionFlags(Qt.TextEditorInteraction)
+        #self.label_out.setTextInteractionFlags(Qt.TextEditorInteraction)
         if not Channel.in_sig:
             # keep at class level as long as only one process is supported
             # when copy-pasting a process the challel in/out signal lists

opengeode.py

@@ -1308,6 +1308,11 @@ class SDL_View(QtGui.QGraphicsView, object):
             scene = self.parent_scene[0][0]
         else:
             scene = self.scene()
+        
+        if not scene:
+            LOG.info('No scene - nothing to save')
+            return False
+
         # Translate scenes to avoid negative coordinates
         for each in scene.all_nested_scenes:
             each.translate_to_origin()