sem_ch8.adb (Note_Redundant_Use): Suppress unhelpful warning about redundant use...

sem_ch8.adb (Note_Redundant_Use): Suppress unhelpful warning about redundant use clauses.

2006-02-13  Bob Duff  <duff@adacore.com>

	* sem_ch8.adb (Note_Redundant_Use): Suppress unhelpful warning about
	redundant use clauses.
	In particular, if the scope of two use clauses overlaps, but one is not
	entirely included in the other, we should not warn.  This can happen
	with nested packages.
	(Analyze_Subprogram_Renaming): Protect the compiler against previously
	reported errors. The bug was reported when the compiler was built
	with assertions enabled.
	(Find_Type): If the node is a 'Class reference and the prefix is a
	synchronized type without a corresponding record, return the type
	itself.

From-SVN: r111093