[gnome-disk-utility] fix some criticals where we tried to access non-existant widgets

[David Zeuthen <davidz src gnome org>]

commit f3d83a789106803b0de2e60bf29447f07d16a54d
Author: David Zeuthen <davidz redhat com>
Date:   Mon Mar 30 17:27:03 2009 -0400

    fix some criticals where we tried to access non-existant widgets
---
 src/gdu-gtk/gdu-gtk.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/gdu-gtk/gdu-gtk.c b/src/gdu-gtk/gdu-gtk.c
index 235948f..fab6ba0 100644
--- a/src/gdu-gtk/gdu-gtk.c
+++ b/src/gdu-gtk/gdu-gtk.c
@@ -479,8 +479,16 @@ gdu_util_dialog_secret_update (DialogSecretData *data)
                 current = gtk_entry_get_text (GTK_ENTRY (data->password_entry));
         else
                 current = NULL;
-        new = gtk_entry_get_text (GTK_ENTRY (data->password_entry_new));
-        verify = gtk_entry_get_text (GTK_ENTRY (data->password_entry_verify));
+
+        if (data->password_entry_new != NULL)
+                new = gtk_entry_get_text (GTK_ENTRY (data->password_entry_new));
+        else
+                new = NULL;
+
+        if (data->password_entry_verify != NULL)
+                verify = gtk_entry_get_text (GTK_ENTRY (data->password_entry_verify));
+        else
+                verify = NULL;
 
         if (g_strcmp0 (new, verify) != 0) {
                 gtk_widget_show (data->warning_hbox);
@@ -502,7 +510,8 @@ gdu_util_dialog_secret_update (DialogSecretData *data)
                 g_free (s);
                 gtk_widget_set_sensitive (data->button, FALSE);
         } else {
-                gtk_widget_hide (data->warning_hbox);
+                if (data->warning_hbox != NULL)
+                        gtk_widget_hide (data->warning_hbox);
                 gtk_widget_set_sensitive (data->button, g_strcmp0 (new, "") != 0);
         }
 }