[gthumb] Crash after changing and renaming file.

[Paolo Bacchilega <paobac src gnome org>]

commit 272b2b2bc5a9b457bdbd272046e9c06162794c43
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Wed Dec 23 18:25:27 2015 +0100

    Crash after changing and renaming file.
    
    [bug #750142]

 gthumb/gth-browser.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gthumb/gth-browser.c b/gthumb/gth-browser.c
index ea8ffdb..af42353 100644
--- a/gthumb/gth-browser.c
+++ b/gthumb/gth-browser.c
@@ -1860,7 +1860,7 @@ static void
 ask_whether_to_save__done (AskSaveData *data,
                           gboolean     cancelled)
 {
-       if (cancelled)
+       if (cancelled && (data->browser->priv->current_file != NULL))
                g_file_info_set_attribute_boolean (data->browser->priv->current_file->info, 
"gth::file::is-modified", TRUE);
        if (data->callback != NULL)
                (*data->callback) (data->browser, cancelled, data->user_data);
@@ -1897,7 +1897,7 @@ ask_whether_to_save__response_cb (GtkWidget   *dialog,
 {
        gtk_widget_destroy (dialog);
 
-       if (response_id == RESPONSE_SAVE)
+       if ((response_id == RESPONSE_SAVE) && (data->browser->priv->viewer_page != NULL))
                gth_viewer_page_save (data->browser->priv->viewer_page,
                                      NULL,
                                      ask_whether_to_save__file_saved_cb,
@@ -3308,7 +3308,7 @@ folder_changed_cb (GthMonitor      *monitor,
                                        g_signal_handlers_unblock_by_data (gth_browser_get_file_list_view 
(browser), browser);
                        }
 
-                       if (current_file_deleted) {
+                       if (current_file_deleted && ! gth_browser_get_file_modified (browser)) {
                                g_file_info_set_attribute_boolean (browser->priv->current_file->info, 
"gth::file::is-modified", FALSE);
 
                                if (new_file != NULL) {
@@ -3390,7 +3390,7 @@ renamed_file_attributes_ready_cb (GthFileSource *file_source,
                g_object_unref (new_info);
                g_object_unref (new_location);
        }
-       else if ((browser->priv->current_file != NULL) && g_file_equal (rename_data->file, 
browser->priv->current_file->file))
+       else if ((browser->priv->current_file != NULL) && g_file_equal (rename_data->file, 
browser->priv->current_file->file) && ! gth_browser_get_file_modified (browser))
                gth_browser_load_file (browser, file_data, FALSE);
 
        rename_data_free (rename_data);