[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 d41c8476dac7aa0e737f3b771f8e5bc1157a7646..5e8b24870cab6c5593499c7fb11893bae44b7fd6 100644 (file)
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -1701,6 +1701,9 @@ 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));
@@ -1953,7 +1956,10 @@ 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));
@@ -2419,7 +2425,10 @@ 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"));