[gnome-disk-utility/udisks2-port] Don't access destroyed widgets

[David Zeuthen <davidz src gnome org>]

commit dea2f1e75a192296ff95a601e789973b8321420f
Author: David Zeuthen <davidz redhat com>
Date:   Thu Jan 5 14:42:14 2012 -0500

    Don't access destroyed widgets
    
    Signed-off-by: David Zeuthen <davidz redhat com>

 src/palimpsest/gdurestorediskimagedialog.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/palimpsest/gdurestorediskimagedialog.c b/src/palimpsest/gdurestorediskimagedialog.c
index 2733418..76fcbf0 100644
--- a/src/palimpsest/gdurestorediskimagedialog.c
+++ b/src/palimpsest/gdurestorediskimagedialog.c
@@ -42,6 +42,8 @@ typedef struct
 {
   volatile gint ref_count;
 
+  gboolean destroying;
+
   GduWindow *window;
   UDisksObject *object;
   UDisksBlock *block;
@@ -89,6 +91,7 @@ restore_disk_image_data_unref (RestoreDiskImageData *data)
 {
   if (g_atomic_int_dec_and_test (&data->ref_count))
     {
+      data->destroying = TRUE;
       if (data->dialog != NULL)
         {
           gtk_widget_hide (data->dialog);
@@ -128,6 +131,9 @@ restore_disk_image_update (RestoreDiskImageData *data)
   gchar *restore_error = NULL;
   GFile *restore_file = NULL;
 
+  if (data->destroying)
+    goto out;
+
   /* don't update if we're already copying */
   if (data->buffer != NULL)
     goto out;