[gnome-builder] project-tree: avoid infinite loop while iterating tree nodes

[Christian Hergert <chergert src gnome org>]

commit 7c39eace38eb55e88cb9b7b6e627110f3b82889c
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jul 2 01:13:30 2016 -0700

    project-tree: avoid infinite loop while iterating tree nodes
    
    This shouldn't be able to happen, but better protect against this anyway
    in case we remove the "root project node".

 plugins/project-tree/gb-project-tree-actions.c |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/plugins/project-tree/gb-project-tree-actions.c b/plugins/project-tree/gb-project-tree-actions.c
index 716ab6b..8cffa71 100644
--- a/plugins/project-tree/gb-project-tree-actions.c
+++ b/plugins/project-tree/gb-project-tree-actions.c
@@ -533,15 +533,19 @@ again:
    */
   if (!is_dir)
     {
-      GtkTreePath *path;
-
       selected = ide_tree_node_get_parent (selected);
-      ide_tree_node_select (selected);
-      path = ide_tree_node_get_path (selected);
-      gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (self), path, NULL, FALSE, 0, 0);
-      gtk_tree_path_free (path);
 
-      goto again;
+      if (!ide_tree_node_is_root (selected))
+        {
+          GtkTreePath *path;
+
+          ide_tree_node_select (selected);
+          path = ide_tree_node_get_path (selected);
+          gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (self), path, NULL, FALSE, 0, 0);
+          gtk_tree_path_free (path);
+
+          goto again;
+        }
     }
 
   if ((self->expanded_in_new = !ide_tree_node_get_expanded (selected)))