Update addalias.py

When I tried to run:
 $ python addalias.py -gui

(python:1963): Gtk-WARNING **: Unable to locate theme engine in module_path: "mist",

(python:1963): Gtk-WARNING **: Unable to locate theme engine in module_path: "mist",
/usr/share/themes/cyan/gtk-2.0/gtkrc:1703: error: unexpected string constant "GimpRuler*", expected character `='
Traceback (most recent call last):
  File "addalias.py", line 274, in <module>
    main()
  File "addalias.py", line 251, in main
    gui = GUI()
  File "addalias.py", line 130, in __init__
    self.load_list()
  File "addalias.py", line 184, in load_list
    for alias in operations.aliaslist():
  File "addalias.py", line 55, in aliaslist
    with open(self.bash_file, 'r') as f:
IOError: [Errno 2] No such file or directory: '/home/dslackw/.bashrc'

I use Slackware linux and and no file .bashrc to $HOME directory, 
whenever I make this change to create an empty file before using.

Best regards
dslackw