decl.c (grokfndecl): Add const cp_decl_specifier_seq* parameter...

decl.c (grokfndecl): Add const cp_decl_specifier_seq* parameter...

/cp
2018-06-20  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (grokfndecl): Add const cp_decl_specifier_seq* parameter;
	tidy handling of a null location_t argument; use proper location
	information in a few additional error messages.
	(grokdeclarator): Update calls.

/testsuite
2018-06-20  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/template/friend65.C: New.
	* g++.dg/cpp0x/main1.C: Likewise.
	* g++.dg/other/main2.C: Likewise.
	* g++.dg/other/main3.C: Likewise.
	* g++.dg/template/friend42.C: Test location too.
	* g++.dg/concepts/decl-diagnose.C: Likewise.
	* g++.dg/warn/main-2.C: Update.

From-SVN: r261816