re PR c++/775 (2.97 error declaring nested class a friend)

re PR c++/775 (2.97 error declaring nested class a friend)

cp:
	PR c++/775
	* cp-tree.h (handle_class_head): Adjust prototype.
	* decl2.c (handle_class_head): Add DEFN_P and NEW_TYPE_P
	parameters. Use for all class heads.
	* parse.y (named_class_head_sans_basetype, named_class_head,
	named_complex_class_head_sans_basetype,
	named_class_head_sans_basetype_defn,
	unnamed_class_head): Remove.
	(class_head, class_head_apparent_template): Recognize class heads
	(class_head_decl, class_head_defn): New reductions. Process class
	heads.
	(structsp): Adjust class definition and class declaration
	reductions.
	(maybe_base_class_list): Give diagnostic on empty list.
testsuite:
	* g++.dg/template/friend2.C: New test.
	* g++.old-deja/g++/brendan/crash8.C: Adjust location of error.

From-SVN: r48466