Fix potential null pointer dereference

Found by cppcheck

diff --git a/src/ui/gui/psppire-dict.c b/src/ui/gui/psppire-dict.c
index b88bbe7766300a6a110bd211902c5e5aa95691c7..0ee608cadef083eacb9f770aecfb37ff9d32af72 100644 (file)
--- a/src/ui/gui/psppire-dict.c
+++ b/src/ui/gui/psppire-dict.c
@@ -680,11 +680,11 @@ tree_model_iter_next (GtkTreeModel *model, GtkTreeIter *iter)
   struct variable *var;
   gint idx;
 
-  g_return_val_if_fail (iter->stamp == dict->stamp, FALSE);
-
   if ( iter == NULL || iter->user_data == NULL)
     return FALSE;
 
+  g_return_val_if_fail (iter->stamp == dict->stamp, FALSE);
+
   var = iter->user_data;
 
   idx = var_get_dict_index (var);