decl.c (grokdeclarator): Use id_loc and EXPR_LOCATION in a few error messages.

decl.c (grokdeclarator): Use id_loc and EXPR_LOCATION in a few error messages.

/cp
2019-08-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (grokdeclarator): Use id_loc and EXPR_LOCATION in
	a few error messages.

/testsuite
2019-08-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/enum20.C: Test location(s) too.
	* g++.dg/other/friend3.C: Likewise.
	* g++.dg/parse/dtor5.C: Likewise.
	* g++.dg/parse/friend7.C: Likewise.
	* g++.dg/template/error22.C: Likewise.
	* g++.old-deja/g++.brendan/err-msg5.C: Likewise.

From-SVN: r274220