2001-01-25  Pavel Cisler  <pavel@eazel.com>

	reviewed by: Michael Engber  <engber@eazel.com>

	Fix 5879 (Close copy source & destination windows -> crash at
		  end of copy operation).

	* libnautilus-extensions/nautilus-directory-metafile.c:
	(nautilus_directory_remove_file_metadata):
	Merge a fix from PR3 branch.

	* libnautilus-extensions/nautilus-gtk-extensions.c:
	(null_the_reference), (nautilus_gtk_null_reference_if_destroyed),
	(nautilus_gtk_stop_null_reference_if_destroyed):
	* libnautilus-extensions/nautilus-gtk-extensions.h:
	Add new magic calls that set up a reference to get nulled out
	when the object it points to is destroyed.

	* libnautilus-extensions/nautilus-file-operations.c:
	(transfer_info_new), (transfer_info_destroy),
	(handle_transfer_ok), (nautilus_file_operations_copy_move),
	(nautilus_file_operations_move_to_trash),
	(nautilus_file_operations_delete), (do_empty_trash):
	Null out a saved reference to the parent window so
	that we don't try to use it after the window gets closed.
	Clean up creation and destruction of TransferInfo.

	* libnautilus-extensions/nautilus-file-operations.c:
	(handle_transfer_ok):
	Fix a case where TransferInfo could get leaked.

	* libnautilus-extensions/nautilus-file-operations.c:
	(new_folder_transfer_callback),
	(nautilus_file_operations_new_folder):
	Rework to make deleting of NewFolderTransferState cleaner.
	Set up parent_view to get nulled out when the view gets closed.

	* libnautilus-extensions/nautilus-preferences-dialog.c:
	(dialog_clicked), (dialog_show), (dialog_destroy),
	Tweaks. Get rid of unneeded casts.

	* src/nautilus-property-browser.c: (add_new_pattern),
	(show_color_selection_window), (add_new_color), (add_new_emblem):
	* src/nautilus-theme-selector.c: (add_new_theme_button_callback):
	* src/nautilus-view-frame-corba.c:
	(impl_Nautilus_ViewFrame__destroy),
	(impl_Nautilus_ViewFrame__create):
	Use new magic calls to null out references.

	* src/nautilus-property-browser.c:
	(nautilus_property_browser_destroy):
	Disconnect from the destroy-watching signal.

	* libnautilus-extensions/nautilus-icon-container.c:
	(set_pending_icon_to_reveal):
	(nautilus_preferences_dialog_construct):
	* src/file-manager/fm-directory-view.c: (copy_move_done_data_free),
	(pre_copy_move), (copy_move_done_partition_func),
	(copy_move_done_callback):
	Use new magic calls to null out references.
	Fix a memory trasher where CopyMoveDoneData was being destroyed too
	early.