decl.c (check_tag_decl): Use DECL_SOURCE_LOCATION.

decl.c (check_tag_decl): Use DECL_SOURCE_LOCATION.

/cp
2019-10-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (check_tag_decl): Use DECL_SOURCE_LOCATION.

/testsuite
2019-10-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/constexpr-union5.C: Test location(s) too.
	* g++.dg/diagnostic/bitfld2.C: Likewise.
	* g++.dg/ext/anon-struct1.C: Likewise.
	* g++.dg/ext/anon-struct6.C: Likewise.
	* g++.dg/ext/flexary19.C: Likewise.
	* g++.dg/ext/flexary9.C: Likewise.
	* g++.dg/template/error17.C: Likewise.

From-SVN: r276958