[gnome-screensaver] Use username in top panel if real name is empty

[Frederic Peters <fpeters src gnome org>]

commit 9a23c3485c42594c8bd8a59a0aa7e27ceade1a8a
Author: Frédéric Péters <fpeters 0d be>
Date:   Wed Feb 2 21:09:33 2011 +0100

    Use username in top panel if real name is empty
    
    https://bugzilla.gnome.org/show_bug.cgi?id=641236

 src/gs-window-x11.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-window-x11.c b/src/gs-window-x11.c
index ce4c4ce..61eb398 100644
--- a/src/gs-window-x11.c
+++ b/src/gs-window-x11.c
@@ -2336,7 +2336,7 @@ get_user_display_name (void)
 
         name = g_get_real_name ();
 
-        if (name == NULL || strcmp (name, "Unknown") == 0) {
+        if (name == NULL || name[0] == '\0' || strcmp (name, "Unknown") == 0) {
                 name = g_get_user_name ();
         }