2001-04-15  Almer S. Tigelaar  <almer@gnome.org>

	* src/parser.y : Add detailed parser error messages.

	* src/workbook-edit.c (workbook_finish_editing) : Abort
	if the expression is invalid and return a boolean indicating
	success or failure.

	* src/expr.c (expr_parse_string): Set error message to the
	result of gnumeric_expr_parser.

	* src/parse-util.c (parse_error_init) : Properly initialize
	begin and end character.

	* src/gnumeric-sheet.c (gnumeric_sheet_key_mode_sheet): Don't
	change the cursor position if workbook_finish_editing failed.
	(move_cursor): Idem.

	* src/item-grid.c (item_grid_button_1): Idem.