2000-12-09  Chema Celorio  <chema@celorio.com>

	* dialog-define-names.c: add NameGuruScope enums
	(name_guru_warn): warn when deleting a name that is beein used
	(name_guru_scope_change): handle scope changes
	(name_guru_set_expr): implement.
	(name_guru_clear_selection): implement
	(name_guru_in_list): implement
	(name_guru_update_sensitivity): implement.
	(cb_name_guru_select_name): clean
	(name_guru_scope_get): implement
	(cb_name_guru_add): fix
	(name_guru_init): conect sensitivy after (see coment on code)

2000-12-09  Chema Celorio  <chema@celorio.com>

	* src/xml-io.c (xml_write_names): Always wrinte a <Names> node,
	even if it is empty. (See coment on code for details)

	* src/sheet.c (sheet_new): make sheet->names NULL.
	(sheet_clone_names): free the list with g_list_free not g_free
	(sheet_clone_names): add a warning about not duplicating
	names yet.

	* src/expr-name.h (expr_name_wb2sheet): add prototypes for
	wb2sheet & sheet2wb

	* src/expr-name.c (expr_name_unlink): new funct. Code form
	expr_name_remove
	(expr_name_remove): call expr_name_unlink
	(expr_name_invalidate_refs_name): add a warning about this function
	not beeing implemented
	(expr_name_invalidate_refs_sheet): ditto
	(expr_name_invalidate_refs_wb): ditto
	(expr_name_sheet2wb): new funct. changed the scope of a NamedExpression
	from sheet to workbook.
	(expr_name_wb2sheet): not implemented yet. Workbook to sheet scope change