prj-dect.adb (Parse_Attribute_Declaration): Do not issue warning for unknown attribute in unknown package or in package...

2006-10-31  Vincent Celier  <celier@adacore.com>

	* prj-dect.adb (Parse_Attribute_Declaration): Do not issue warning for
	unknown attribute in unknown package or in package that does not need
	to be checked.
	(Parse_Package_Declaration): Do not issue warning for unknown package in
	quiet output.

From-SVN: r118291