[libdazzle] treenode: handle NULL path in expanded check

[Christian Hergert <chergert src gnome org>]

commit b8f9b055726593e1aa9e22eecb880f10c0ddc145
Author: Christian Hergert <chergert redhat com>
Date:   Tue Nov 28 23:07:46 2017 -0800

    treenode: handle NULL path in expanded check

 src/tree/dzl-tree-node.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/src/tree/dzl-tree-node.c b/src/tree/dzl-tree-node.c
index b5013e6..4968671 100644
--- a/src/tree/dzl-tree-node.c
+++ b/src/tree/dzl-tree-node.c
@@ -661,16 +661,19 @@ dzl_tree_node_invalidate (DzlTreeNode *self)
 gboolean
 dzl_tree_node_get_expanded (DzlTreeNode *self)
 {
-  GtkTreePath *path;
   gboolean ret = TRUE;
 
   g_return_val_if_fail (DZL_IS_TREE_NODE (self), FALSE);
 
   if ((self->tree != NULL) && (self->parent != NULL))
     {
-      path = dzl_tree_node_get_path (self);
-      ret = gtk_tree_view_row_expanded (GTK_TREE_VIEW (self->tree), path);
-      gtk_tree_path_free (path);
+      GtkTreePath *path = dzl_tree_node_get_path (self);
+
+      if (path != NULL)
+        {
+          ret = gtk_tree_view_row_expanded (GTK_TREE_VIEW (self->tree), path);
+          gtk_tree_path_free (path);
+        }
     }
 
   return ret;