[shell] Make sure total_num_bytes > 0 before using it in progress callbacks

Fixes bgo#597691

diff --git a/shell/ev-window.c b/shell/ev-window.c
index 9a77d7080f9009bcafc0c7784514e668af5a5fa0..e0e27c3066c968721a41ac8e65796a248f37edec 100644 (file)
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -1755,6 +1755,9 @@ window_open_file_copy_progress_cb (goffset   n_bytes,
        if (!ev_window->priv->message_area)
                return;
 
+       if (total_bytes <= 0)
+               return;
+
        fraction = n_bytes / (gdouble)total_bytes;
        status = g_strdup_printf (_("Downloading document (%d%%)"),
                                  (gint)(fraction * 100));
@@ -1937,7 +1940,10 @@ reload_remote_copy_progress_cb (goffset   n_bytes,
        
        if (!ev_window->priv->message_area)
                return;
-       
+
+       if (total_bytes <= 0)
+               return;
+
        fraction = n_bytes / (gdouble)total_bytes;
        status = g_strdup_printf (_("Downloading document (%d%%)"),
                                  (gint)(fraction * 100));
@@ -2485,7 +2491,10 @@ window_save_file_copy_progress_cb (goffset n_bytes,
        
        if (!ev_window->priv->message_area)
                return;
-       
+
+       if (total_bytes <= 0)
+               return;
+
        fraction = n_bytes / (gdouble)total_bytes;
        save_type = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (dst), "save-type"));