spansh.py: misc fixes

spansh.py

@@ -122,7 +122,7 @@ SORT = {
       }
     }
 
-out =""
+out = None
 if args.subcommand == "nearestsystem":
   out = getNearestSystem(args.coordinate)
 elif args.subcommand == "oldstations":
@@ -130,12 +130,6 @@ elif args.subcommand == "oldstations":
     out = getOldStationsInSystem(args.system)
   else:
     out = getOldStations()
-else:
-  parser.print_usage(sys.stderr)
-  sys.exit(1)
 
-if out == "":
-  sys.exit(3)
-else:
 print(out)
 sys.exit(0)