encountering a method with the correct name that does not have the
    "overload" directive (same logic as when looking for a call candidate,
    to avoid errors when using a Pascal-level wrapper to call interface
    methods, and Delphi-compatible since it always required "overload" for
    overloaded methods)
   o also catches calling convention mismatches like in webtbs/tw27349

git-svn-id: trunk@40683 -