[FORGE odepkg] Update, deprecation and FORTRAN warnings

[Juan Pablo Carbajal]

Hi all,

I have just updated odepkg to use octave_scalar_map instead of the
deprecated Octave_map and correspodnig methods.

Also, odepkg has several auxiliary functions that were necessary at
the time it was written but now are part of the libinterp core
functions. I detected one that is not necessary anymore and remove it,
as well as all the corresponding calls.

odepkg_auxiliary_getmapvalue (string key, octave_map map);

was replaced with

map.contents(key);

The package now compiles without warnings or errors in the C++ code,
However I am getting several warnings on the FORTRAN code of this
kind:

daskr/ddaskr.f:1954.20:

     *   RWORK(LRX),JROOT,IRT,RWORK(LROUND),INFO(3),
                    1
Warning: Rank mismatch in argument 'jroot' at (1) (rank-1 and scalar)

Anybody knows how to fix those warnings? I knew FORTRAN but I have
happily forgotten all about it ;)