pt.c (check_template_shadow): Emit error + inform instead of two errors.

pt.c (check_template_shadow): Emit error + inform instead of two errors.

/cp
2015-07-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* pt.c (check_template_shadow): Emit error + inform instead of
	two errors.

/testsuite
2015-07-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/template/crash81.C: Adjust for error + inform change.
	* g++.dg/template/pr58878.C: Likewise.
	* g++.dg/template/shadow1.C: Likewise.
	* g++.dg/template/shadow2.C: Likewise.
	* g++.old-deja/g++.benjamin/tem03.C: Likewise.
	* g++.old-deja/g++.benjamin/tem04.C: Likewise.
	* g++.old-deja/g++.brendan/crash7.C: Likewise.
	* g++.old-deja/g++.pt/shadow2.C: Likewise.

From-SVN: r225783