* diagnostic.c (error_at): New.
        * toplev.h (error_at): New prototype.
        * c-typeck.c (build_array_ref): Call error_at instead of error.
        Pass location to pedwarn.
cp/
        * typeck.c (build_array_ref): Use new location argument.
        * class.c (build_vtbl_ref_1): Pass location to build_array_ref.
        * call.c (build_new_op): Same.
        * decl2.c (grok_array_decl): Same.
        * cp-tree.h (build_array_ref): Add location argument to prototype.

From-SVN: r139924