class.c (add_method): Change pair of errors to error + inform.

class.c (add_method): Change pair of errors to error + inform.

/cp
2017-06-29  Paolo Carlini  <paolo.carlini@oracle.com>

	* class.c (add_method): Change pair of errors to error + inform.
	(handle_using_decl): Likewise.

/testsuite
2017-06-29  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/inh-ctor3.C: Adjust for dg-message vs dg-error.
	* g++.dg/diagnostic/variadic1.C: Likewise.
	* g++.dg/gomp/udr-3.C: Likewise.
	* g++.dg/overload/error1.C: Likewise.
	* g++.dg/overload/error2.C: Likewise.
	* g++.dg/template/duplicate1.C: Likewise.
	* g++.old-deja/g++.benjamin/warn02.C: Likewise.
	* g++.old-deja/g++.brendan/arm2.C: Likewise.
	* g++.old-deja/g++.other/redecl2.C: Likewise.
	* g++.old-deja/g++.other/redecl4.C: Likewise.
	* g++.old-deja/g++.pt/memtemp78.C: Likewise.

From-SVN: r249820