TOMOYO: Fix domain transition failure warning.

Commit bd03a3e4 "TOMOYO: Add policy namespace support." introduced policy
namespace. But as of /sbin/modprobe is executed from initramfs/initrd, profiles
for target domain's namespace is not defined because /sbin/tomoyo-init is not
yet called.
Reported-by: Jamie Nguyen <jamie@tomoyolinux.co.uk>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

security/tomoyo/domain.c

@@ -515,7 +515,8 @@ struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
 			 * that domain. Do not perform domain transition if
 			 * profile for that domain is not yet created.
 			 */
-			if (!entry->ns->profile_ptr[entry->profile])
+			if (tomoyo_policy_loaded &&
+			    !entry->ns->profile_ptr[entry->profile])
 				return NULL;
 		}
 		return entry;