Default config param to empty list

str0.py

@@ -30,7 +30,7 @@ if __name__ == '__main__':
 	
 	parser.add_argument('binary', help = "Binary file to patch", type = argparse.FileType(mode = 'rb+'))
 	parser.add_argument('-c', '--config', help = "List of files / strings to match",
-			action = 'append')
+			action = 'append', default = [])
 	
 	args = parser.parse_args()