gtk-demo: Check a return value

Found by coverity.

diff --git a/demos/gtk-demo/main.c b/demos/gtk-demo/main.c
index b8131b94136881f78f33295c3c66846bf272c91c..ee87fc983dee9bcde6c3a9c0b9fb8703ceb4a60d 100644 (file)
--- a/demos/gtk-demo/main.c
+++ b/demos/gtk-demo/main.c
@@ -158,9 +158,8 @@ activate_run (GSimpleAction *action,
   GtkTreeIter iter;
 
   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
-  gtk_tree_selection_get_selected (selection, &model, &iter);
-
-  run_example_for_row (window, model, &iter);
+  if (gtk_tree_selection_get_selected (selection, &model, &iter))
+    run_example_for_row (window, model, &iter);
 }
 
 /* Stupid syntax highlighting.