Revert changeset a3822cb3b2b3c24e6b46c1fed3e6c366817f52ad.

With this changeset the error message is incorrect.
Revert: Fix the exception thrown when doing, for example,
        "xm domid" on a non-existent domain.
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>

tools/python/xen/xm/main.py

@@ -666,7 +666,7 @@ def main(argv=sys.argv):
             sys.exit(1)
         except XendError, ex:
             if len(args) > 0:
-                handle_xend_error(argv[1], args[0], ex)
+                handle_xend_error(argv[1], args[1], ex)
             else:
                 print "Unexpected error:", sys.exc_info()[0]
                 print