small libf2c cleanups

[Dave Love]

>>>>> "Jeffrey" == Jeffrey A Law <law@hurl.cygnus.com> writes:

 >> Thing is, I don't know that there's really anything to change it to.
 >> There's no pointer-sized-integer type is there?  
 Jeffrey> We could create one.

_Please_ don't change the language without consulting burley.
Especially in that nightmarish area!

 Jeffrey> Also note that using them without a prototype can lead to
 Jeffrey> problems on some systems.

Right, I just wanted to know if this was a real problem for the
released version that we should know about.

 Jeffrey> Like when size_t isn't the same size as an int and you try
 Jeffrey> to do something like strncpy (foo, bar, 5)

Sounds as though the GNU coding standard needs updating re. that
example.