[empathy: 16/53] Return NULL if _new is not given a GtkWindow.

[Jonny Lamb <jonnylamb src gnome org>]

commit 563cdd3b2e98eaf6225727f3320eb81826eaa41d
Author: Jonny Lamb <jonny lamb collabora co uk>
Date:   Mon Apr 20 15:46:16 2009 +0100

    Return NULL if _new is not given a GtkWindow.
    
    Signed-off-by: Jonny Lamb <jonny lamb collabora co uk>
---
 src/empathy-debug-dialog.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/empathy-debug-dialog.c b/src/empathy-debug-dialog.c
index 802816e..8c83d09 100644
--- a/src/empathy-debug-dialog.c
+++ b/src/empathy-debug-dialog.c
@@ -581,6 +581,8 @@ empathy_debug_dialog_class_init (EmpathyDebugDialogClass *klass)
 GtkWidget *
 empathy_debug_dialog_new (GtkWindow *parent)
 {
+  g_return_val_if_fail (GTK_IS_WINDOW (parent), NULL);
+
   return GTK_WIDGET (g_object_new (EMPATHY_TYPE_DEBUG_DIALOG,
       "parent", parent, NULL));
 }