[gtk+/a11y] GailTreeView: deal with absence of model

[Matthias Clasen <matthiasc src gnome org>]

commit 71c2258821b82db77cd2ac0622abeb4f55c03eb7
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jun 21 18:53:06 2011 -0400

    GailTreeView: deal with absence of model

 gtk/a11y/gailtreeview.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gtk/a11y/gailtreeview.c b/gtk/a11y/gailtreeview.c
index 77ef9c9..338e646 100644
--- a/gtk/a11y/gailtreeview.c
+++ b/gtk/a11y/gailtreeview.c
@@ -1271,7 +1271,9 @@ gail_tree_view_get_n_rows (AtkTable *table)
   tree_view = GTK_TREE_VIEW (widget);
   tree_model = gtk_tree_view_get_model (tree_view);
 
-  if (gtk_tree_model_get_flags (tree_model) & GTK_TREE_MODEL_LIST_ONLY)
+  if (!tree_model)
+    n_rows = 0;
+  else if (gtk_tree_model_get_flags (tree_model) & GTK_TREE_MODEL_LIST_ONLY)
    /* 
     * If working with a LIST store, then this is a faster way
     * to get the number of rows.