97/04/03 EF
Compiled topo.c and topo_s.c into mex files for Matlab5 using path of least
resistance for now:

nene% /usr/local/matlab/bin/mex -V4 -DUSE_FUNCTION_PROTOTYPES topo.c
nene% /usr/local/matlab/bin/mex -V4 -DUSE_FUNCTION_PROTOTYPES topo_s.c

OK, that did not work, so there is no alternative to simply converting this
mex file to a genuine Matlab5 model.

Done for topo.c.