[PATCH] xl: allow nameless domains to be named

[Jeremy Fitzhardinge <jeremy@goop.org>]

At present, find_domain() will exit(2) if you specify a domain by
number, but that domain doesn't have a corresponding name.  However,
nothing seem to critically depend on common_domname being set, and the
test prevents dom0 or other nameless domains from being named.  So just
remove the check.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

diff -r ba7fdd53f44c tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c	Tue May 25 13:37:20 2010 -0700
+++ b/tools/libxl/xl_cmdimpl.c	Tue May 25 13:40:53 2010 -0700
@@ -138,10 +138,6 @@
         exit(2);
     }
     common_domname = was_name ? p : libxl_domid_to_name(&ctx, domid);
-    if (!common_domname) {
-        fprintf(stderr, "%s is an invalid domain identifier.\n", p);
-        exit(2);
-    }
 }
 
 #define LOG(_f, _a...)   dolog(__FILE__, __LINE__, __func__, _f "\n", ##_a)