Add named log level

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/gfio.c b/gfio.c
index 559c7bd..6b6d2b8 100644
--- a/gfio.c
+++ b/gfio.c
@@ -293,7 +293,7 @@
 	GtkListStore *model;
 	GtkWidget *tree_view;
 
-	model = gtk_list_store_new(4, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_INT, G_TYPE_STRING);
+	model = gtk_list_store_new(4, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING);
 
 	tree_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
 	gtk_widget_set_can_focus(tree_view, FALSE);