[krb5-auth-dialog] Use current user name to determine principal

[Guido Günther <guidog src gnome org>]

commit 6bb3c08904ff5ee373d3782004130ae341191437
Author: Guido Günther <agx sigxcpu org>
Date:   Mon Oct 20 10:31:16 2014 +0200

    Use current user name to determine principal
    
    This got broken when switching from GConf to GSettings.

 src/ka-kerberos.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/ka-kerberos.c b/src/ka-kerberos.c
index fc6d63f..a17dee3 100644
--- a/src/ka-kerberos.c
+++ b/src/ka-kerberos.c
@@ -649,6 +649,10 @@ ka_parse_name (KaApplet *applet, krb5_context krbcontext,
         krb5_free_principal (krbcontext, *kprinc);
 
     g_object_get (applet, KA_PROP_NAME_PRINCIPAL, &principal, NULL);
+    if (principal[0] == '\0') {
+        g_free (principal);
+        principal = g_strdup (g_get_user_name());
+    }
     ret = krb5_parse_name (krbcontext, principal, kprinc);
 
     g_free (principal);