scrolledwindow: handle NULL cursor safely

It's possible to get a NULL cursor back if there are improperly
configured or missing cursors on the system.

diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index c4bec8b23660cf2403bfaf0eb981f5f43cc2abc8..27d5e7bba804e312ee40c85d96dcb6d75538e4f0 100644 (file)
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -3396,7 +3396,7 @@ install_scroll_cursor (GtkScrolledWindow *scrolled_window,
   display = gdk_window_get_display (priv->scroll_window);
   cursor = gdk_cursor_new_from_name (display, "all-scroll");
   gdk_window_set_cursor (priv->scroll_window, cursor);
-  g_object_unref (cursor);
+  g_clear_object (&cursor);
 }
 
 static void