s3: Fix a segfault with debug level 3 on Solaris

printf can not deal with NULL strings

diff --git a/source3/smbd/password.c b/source3/smbd/password.c
index 39cde15aafec5bfd0bc9e8dc65fb6040bcb6e016..2a76d830b50018396ad917492feb5287cf62278f 100644 (file)
--- a/source3/smbd/password.c
+++ b/source3/smbd/password.c
@@ -286,7 +286,8 @@ int register_existing_vuid(struct smbd_server_connection *sconn,
 
        DEBUG(3, ("register_existing_vuid: User name: %s\t"
                  "Real name: %s\n", vuser->session_info->unix_info->unix_name,
-                 vuser->session_info->info->full_name));
+                 vuser->session_info->info->full_name ?
+                 vuser->session_info->info->full_name : ""));
 
        if (!vuser->session_info->security_token) {
                DEBUG(1, ("register_existing_vuid: session_info does not "