[telepathy-account-widgets] account-widget: Fix 'default_display_name' leak

[Christophe Fergeau <teuf src gnome org>]

commit 568fd67cab805bc6595c34f7a3cacc5f5e7e4d70
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Wed Jul 29 09:49:27 2015 +0200

    account-widget: Fix 'default_display_name' leak
    
    do_constructed() leaks the string returned by
    tpaw_account_widget_get_default_display_name():
    
    ==15713== 21 bytes in 1 blocks are definitely lost in loss record 3,415 of 16,664
    ==15713==    at 0x4A06C50: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
    ==15713==    by 0x36E2E76B57: vasprintf (vasprintf.c:76)
    ==15713==    by 0x7F60DD2: g_vasprintf (gprintf.c:316)
    ==15713==    by 0x7F30D70: g_strdup_vprintf (gstrfuncs.c:507)
    ==15713==    by 0x7F30E15: g_strdup_printf (gstrfuncs.c:533)
    ==15713==    by 0x4FAAD98: tpaw_account_widget_get_default_display_name (tpaw-account-widget.c:2192)
    ==15713==    by 0x4FAA444: do_constructed (tpaw-account-widget.c:1960)
    ==15713==    by 0x7C7CC10: g_object_new_internal (gobject.c:1814)
    ==15713==    by 0x7C7D71A: g_object_new_valist (gobject.c:2033)
    ==15713==    by 0x7C7C6C5: g_object_new (gobject.c:1617)
    ==15713==    by 0x4FAABCC: tpaw_account_widget_new_for_protocol (tpaw-account-widget.c:2127)
    ==15713==    by 0x4F81352: edit_connection_parameters (goatelepathyprovider.c:544)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=752938

 tp-account-widgets/tpaw-account-widget.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/tp-account-widgets/tpaw-account-widget.c b/tp-account-widgets/tpaw-account-widget.c
index 93b672d..64a97d1 100644
--- a/tp-account-widgets/tpaw-account-widget.c
+++ b/tp-account-widgets/tpaw-account-widget.c
@@ -1787,7 +1787,8 @@ static void
 do_constructed (GObject *obj)
 {
   TpawAccountWidget *self = TPAW_ACCOUNT_WIDGET (obj);
-  const gchar *display_name, *default_display_name;
+  const gchar *display_name;
+  gchar *default_display_name;
   guint i = 0;
   struct {
     const gchar *cm_name;
@@ -1967,6 +1968,7 @@ do_constructed (GObject *obj)
       g_object_set (self->priv->settings, "display-name-overridden", TRUE,
           NULL);
     }
+  g_free (default_display_name);
 }
 
 static void