2006-03-14  Morten Welinder  <terra@gnome.org>

	* src/expr.c (gnm_expr_rewrite): Use gnm_expr_new_funcallv and
	gnm_expr_new_setv.
	(gnm_expr_new_funcallv, gnm_expr_new_setv): New functions.
	(gnm_expr_free): Renamed from gnm_expr_unref.  Always to deep
	free.  All callers changed.
	(gnm_expr_copy): Deep copy.

	* src/clipboard.c (paste_cell_with_operation): Build a regular
	expressions.  No hacks.