have the send_event field in all GdkEvents.
gtkmenu.c, gtkacceleratortable.c, gtkwindow.c: unreference accelerator_table.
gtk_object_query_args: removed seq_ids again, must have been quite tired
when i commited that change ;)
gtkoptionmenu.c: assure GTK_BIN()->child is empty when reparenting
a menu_items child.
gtkwindow.c: fixed some memory leaks.

-timj