fix for issue NullArray#1060

Author: Ekultek

lib/term/terminal.py

@@ -562,7 +562,7 @@ def terminal_main_display(self, tokens, extra_commands=None, save_history=True):
  print(self.do_load_custom_hosts.__doc__)
  except TypeError:
  pass
- if len(choice_data_list) == 1:
+ if choice_data_list is not None and len(choice_data_list) == 1:
  lib.output.error("must provide full path to file after `{}` keyword".format(choice))
  else:
  self.do_load_custom_hosts(choice_data_list[-1])