[gnome-shell] gdm: fix empty real name check

[Ray Strode <halfline src gnome org>]

commit 735397aa896fe91e54b8210d535e9fa28a8d9109
Author: Ray Strode <rstrode redhat com>
Date:   Tue Mar 15 15:19:58 2011 -0400

    gdm: fix empty real name check
    
    gdm_user_get_real_name() checks for an empty real
    name and automatically falls back to username if
    real name is NULL.  It doesn't automatically fall
    back to username if real name is empty, however.
    
    This commit makes it fall back for both cases.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=644765

 src/gdmuser/gdm-user.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/src/gdmuser/gdm-user.c b/src/gdmuser/gdm-user.c
index 735c2cb..0a592cc 100644
--- a/src/gdmuser/gdm-user.c
+++ b/src/gdmuser/gdm-user.c
@@ -407,7 +407,9 @@ gdm_user_get_uid (GdmUser *user)
  * gdm_user_get_real_name:
  * @user: the user object to examine.
  *
- * Retrieves the display name of @user.
+ * Retrieves a displayable name for @user. By default this is the real name
+ * of the user, but will fall back to the user name if there is no real name
+ * defined.
  *
  * Returns: (transfer none): a pointer to an array of characters which must not be modified or
  *  freed, or %NULL.
@@ -417,7 +419,12 @@ gdm_user_get_real_name (GdmUser *user)
 {
         g_return_val_if_fail (GDM_IS_USER (user), NULL);
 
-        return (user->real_name ? user->real_name : user->user_name);
+        if (user->real_name == NULL ||
+            user->real_name[0] == '\0') {
+                return user->user_name;
+        }
+
+        return user->real_name;
 }
 
 /**