cp:
	* class.c (duplicate_tag_error): Adjust diagnostic.
	(finish_struct): Locally set location to start of struct.
	* decl.c (fixup_anonymous_aggr): Use cp_error_at.
testsuite:
	* g++.old-deja/g++.benjamin/15309-1.C: Expect diagnostic at
	start of structs.
	* g++.old-deja/g++.benjamin/15309-2.C: Likewise.
	* g++.old-deja/g++.brendan/crash17.C: Likewise.
	* g++.old-deja/g++.brendan/crash29.C: Likewise.
	* g++.old-deja/g++.brendan/crash48.C: Likewise.
	* g++.old-deja/g++.brendan/ns1.C: Likewise.
	* g++.old-deja/g++.brendan/warnings1.C: Likewise.
	* g++.old-deja/g++.bugs/900205_04.C: Likewise.
	* g++.old-deja/g++.bugs/900514_03.C: Likewise.
	* g++.old-deja/g++.eh/spec6.C: Likewise.
	* g++.old-deja/g++.jason/crash3.C: Likewise.
	* g++.old-deja/g++.law/ctors11.C: Likewise.
	* g++.old-deja/g++.law/ctors17.C: Likewise.
	* g++.old-deja/g++.law/ctors5.C: Likewise.
	* g++.old-deja/g++.law/ctors9.C: Likewise.
	* g++.old-deja/g++.mike/ambig1.C: Likewise.
	* g++.old-deja/g++.mike/net22.C: Likewise.
	* g++.old-deja/g++.mike/p3538a.C: Likewise.
	* g++.old-deja/g++.mike/p3538b.C: Likewise.
	* g++.old-deja/g++.mike/virt3.C: Likewise.
	* g++.old-deja/g++.niklas/t128.C: Likewise.
	* g++.old-deja/g++.other/anon4.C: Likewise.
	* g++.old-deja/g++.other/using1.C: Likewise.
	* g++.old-deja/g++.other/warn3.C: Likewise.
	* g++.old-deja/g++.pt/t37.C: Likewise.
	* g++.old-deja/g++.robertl/eb69.C: Likewise.
	* g++.old-deja/g++.robertl/eb71.C: Likewise.

From-SVN: r38798