Various reentrancy fixes for widgets being destroyed out of

Various reentrancy fixes for widgets being destroyed out of

Thu Feb 12 21:58:20 2004  Owen Taylor  <otaylor@redhat.com>

        Various reentrancy fixes for widgets being destroyed
        out of focus-out-event. (#128821, Grant Gayed)

        * gtk/gtkwindow.c (_gtk_window_unset_focus_and_default):
        Ref window and widget over callbacks.

        * gtk/gtkwidget.c (gtk_widget_hide)
          gtk/gtkwidget.c (gtk_widget_set_child_visible):
        Ref the widget before calling _gtk_window_unset_focus_and_default(),
        since that can call user callbacks.

        * gtk/gtkwidget.c (gtk_widget_invalidate_widget_windows):
        Do nothing if the widget isn't realized.