2003-06-24  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpimage-undo-push.c (undo_pop_image_grid)
	* app/core/gimpimage.c (gimp_image_set_grid): ref/unref the grid.

	* app/gui/view-commands.c (view_configure_grid_cmd_callback): set
	the dialog transient for the shell, make shell->grid_dialog a
	weak pointer of the grid dialog.

	* app/gui/grid-dialog.c: don't set shell->grid_dialog to NULL
	here, attach the grid using g_object_set_data_full() and don't
	unref it explicitely. Use gimp_config_is_equal_to() instead of
	gimp_config_diff().