createinterface: Catch error when creating stub (bz 1065042)

virtManager/createinterface.py

@@ -546,9 +546,14 @@ class vmmCreateInterface(vmmGObjectUI):
             row_dict[name] = row
 
         for name, row in nodedevs.items():
+            try:
                 key = Interface(self.conn.get_backend())
                 key.type = Interface.INTERFACE_TYPE_ETHERNET
                 key.name = name
+            except Exception, e:
+                logging.debug("Error creating stub interface '%s': %s",
+                    name, e)
+                continue
             row[INTERFACE_ROW_KEY] = key
             row_dict[name] = row