(shadow_tag_warned): Let warned have three values, so that a mere warning doesn't...

(shadow_tag_warned): Let warned have three values, so that a mere warning doesn't prevent a pedwarn.

(shadow_tag_warned): Let warned have three values, so that a mere
warning doesn't prevent a pedwarn.  Don't skip the error call at the
end on accounted of warned.

From-SVN: r4203