* app/widgets/gimpdock.[ch]: Make instance members private.

(gimp_dock_get_context)
(gimp_dock_get_dialog_factory)
(gimp_dock_get_dockbooks)
(gimp_dock_get_main_vbox)
(gimp_dock_get_vbox)
(gimp_dock_get_id): New getters.

* app/actions/actions.c
* app/actions/dockable-actions.c
* app/actions/dockable-commands.c
* app/actions/windows-actions.c
* app/menus/windows-menu.c
* app/widgets/gimpdialogfactory.c
* app/widgets/gimpdock.c
* app/widgets/gimpdock.h
* app/widgets/gimpdockable.c
* app/widgets/gimpdockbook.c
* app/widgets/gimpdockseparator.c
* app/widgets/gimpimagedock.c
* app/widgets/gimpmenudock.c
* app/widgets/gimpsessioninfo-book.c
* app/widgets/gimpsessioninfo-dock.c
* app/widgets/gimpsessioninfo-dockable.c
* app/widgets/gimptoolbox-color-area.c
* app/widgets/gimptoolbox-dnd.c
* app/widgets/gimptoolbox-image-area.c
* app/widgets/gimptoolbox-indicator-area.c
* app/widgets/gimptoolbox.c: Use new getters.

svn path=/trunk/; revision=27881