[gnome-disk-utility/udisks2-port] When restoring a disk image, don't spew warning if auth dialog is canceled

[David Zeuthen <davidz src gnome org>]

commit cad1934583a5dd61cca8a80f3814bc9c047f7a2d
Author: David Zeuthen <davidz redhat com>
Date:   Fri Jan 20 12:01:04 2012 -0500

    When restoring a disk image, don't spew warning if auth dialog is canceled
    
    Signed-off-by: David Zeuthen <davidz redhat com>

 src/palimpsest/gdurestorediskimagedialog.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/palimpsest/gdurestorediskimagedialog.c b/src/palimpsest/gdurestorediskimagedialog.c
index 35fca0b..c0365f5 100644
--- a/src/palimpsest/gdurestorediskimagedialog.c
+++ b/src/palimpsest/gdurestorediskimagedialog.c
@@ -124,7 +124,8 @@ static void
 restore_disk_image_data_complete (RestoreDiskImageData *data)
 {
   g_cancellable_cancel (data->cancellable);
-  gtk_dialog_response (GTK_DIALOG (data->dialog), GTK_RESPONSE_CANCEL);
+  if (data->dialog != NULL)
+    gtk_dialog_response (GTK_DIALOG (data->dialog), GTK_RESPONSE_CANCEL);
 }
 
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