2002-12-19  Morten Welinder  <terra@diku.dk>

	* src/parse-util.h (GnmExprConventions): Add cell_ref_handler
	and range_ref_handler members.

	* src/expr.c (do_expr_as_string): Call cell_ref_handler and
	range_ref_handler.

	* src/parse-util.c (gnm_expr_conventions_new): Set default
	cell_ref_handler and range_ref_handler.
	(col_name_internal): Change to take an accumulator GString.  All
	callers changed.
	(row_name_internal): Ditto.
	(rangeref_as_string): Ditto.
	(cellref_as_string): Ditto.