2005-03-08  Robert Dewar  <dewar@adacore.com>

	* a-stzunb.adb, a-stzunb.adb a-stzunb.ads, a-stzunb.ads,
	a-stwiun.ads, a-stwiun.adb, a-strunb.ads, a-strunb.adb: Move
	Realloc_For_Chunk to private part of package.
	New subprograms for AI-301

	* a-szuzti.adb, a-suteio.adb, a-swuwti.adb: Improve efficiency of
	Get_Line procedure.
	Avoid unnecessary use of Get/Set_Wide_String

From-SVN: r96487