re PR c++/2513 (internal template template parameter causes ICE)

re PR c++/2513 (internal template template parameter causes ICE)

	PR c++/2513
	* decl.c (make_typename_type): Use dependent_type_p.
	(make_unbound_class_template): Likewise.
	* pt.c (instantiate_class_template): Increment
	processing_template_decl during substitution of template friend
	function.  Preincrement processing_template_decl rather than
	postincrement.
	(get_mostly_instantiated_function_type): Increment
	processing_template_decl during partial substitution of function
	type.

	* g++.dg/template/typename5.C: New test.

From-SVN: r72611