[gtk+] treeview: Simplify a check

[Benjamin Otte <otte src gnome org>]

commit aa1cab1ec255d01f4d58cc1bf3bec569e22fbec7
Author: Benjamin Otte <otte redhat com>
Date:   Tue Nov 15 15:12:34 2011 +0100

    treeview: Simplify a check
    
    Use the same method as elsewhere.

 gtk/gtktreeview.c |   12 +-----------
 1 files changed, 1 insertions(+), 11 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index df62911..1fe6031 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -12257,20 +12257,10 @@ gtk_tree_view_set_expander_column (GtkTreeView       *tree_view,
 {
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
   g_return_if_fail (column == NULL || GTK_IS_TREE_VIEW_COLUMN (column));
+  g_return_if_fail (column == NULL || gtk_tree_view_column_get_tree_view (column) == GTK_WIDGET (tree_view));
 
   if (tree_view->priv->expander_column != column)
     {
-      GList *list;
-
-      if (column)
-	{
-	  /* Confirm that column is in tree_view */
-	  for (list = tree_view->priv->columns; list; list = list->next)
-	    if (list->data == column)
-	      break;
-	  g_return_if_fail (list != NULL);
-	}
-
       tree_view->priv->expander_column = column;
       g_object_notify (G_OBJECT (tree_view), "expander-column");
     }