[Bug fortran/57217] [4.7/4.8/4.9 Regression][OOP] Accepts invalid TBP overriding - lacking arguments check

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57217

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
See draft patch at http://gcc.gnu.org/ml/fortran/2013-05/msg00035.html (see
patch review for what is missing).