[gtk+] gtk: add cast to fix warning in my last commit

[Michael Natterer <mitch src gnome org>]

commit 10c76c1c956c9dee46a6d9e28b9456967d508889
Author: Michael Natterer <mitch gimp org>
Date:   Thu Oct 14 11:32:44 2010 +0200

    gtk: add cast to fix warning in my last commit

 gtk/gtkfilechooserdefault.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkfilechooserdefault.c b/gtk/gtkfilechooserdefault.c
index 24c42f3..38c26d6 100644
--- a/gtk/gtkfilechooserdefault.c
+++ b/gtk/gtkfilechooserdefault.c
@@ -6226,7 +6226,7 @@ show_and_select_files (GtkFileChooserDefault *impl,
 
           gtk_tree_selection_select_iter (selection, &iter);
 
-          path = gtk_tree_model_get_path (fsmodel, &iter);
+          path = gtk_tree_model_get_path (GTK_TREE_MODEL (fsmodel), &iter);
           gtk_tree_view_set_cursor (GTK_TREE_VIEW (impl->browse_files_tree_view),
                                     path, NULL, FALSE);
           gtk_tree_path_free (path);