2007-04-20  Robert Dewar  <dewar@adacore.com>

	* sinput.ads, sinput.adb, uintp.ads, urealp.adb, stringt.adb,
	sem_elim.adb, prj-strt.adb, repinfo.ads, repinfo.adb, namet.ads,
	elists.ads, elists.adb, lib.ads, lib.adb (Unlock): New procedure.
	Fix lower bound of tables.
	Add rep clauses.

	* nlists.adb: Ditto.
	(Prev_Node, Next_Node): Change index type to Int so that it properly
	covers the range First_Node_Id - 1 up.

From-SVN: r125391