[Bug fortran/61126] gfortran does not enable -Wununused-parameter with -Wextra

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61126

--- Comment #14 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #13)
> This builds gfortran and fixes the testcase, but I haven't tested it beyond
> that.

Together with the patch in comment #10, of course.