decl.c (grokdeclarator): Complain about a variable using constructor syntax coming back null from start_decl.

	* decl.c (grokdeclarator): Complain about a variable using
	constructor syntax coming back null from start_decl.
Fixes g++.other/decl2.C
	* friend.c (make_friend_class): Complain about trying to make
	a non-class type a friend.
Fixes g++.other/friend5.C
	* decl.c (grokfndecl): Set DECL_INITIAL for a defn here.
	(start_function): Not here.
Fixes g++.law/friend4.C

From-SVN: r23353