2007-04-20  Bob Duff  <duff@adacore.com>

	* g-expect-vms.adb: 
	(Send_Signal, Close): Raise Invalid_Process if the process id is invalid.
	* g-expect.ads, g-expect.adb (Send): Avoid useless copy of the string.
	(Send_Signal, Close): Raise Invalid_Process if the process id is
	invalid.
	(Pattern_Matcher_Access): Is now a general access type to be able to
	use aliased string.

From-SVN: r125361