A prototype for final.c

[Jeffrey A Law]

  > > None on most modern systems.  "getwd" is the one found on most systems
  > > these days.
  > 
  > I've got getcwd(3) in unistd.h under glibc-2.0.94. BTW, glibc tells me that
  > getwd(3) is insecure and deprecated. Time to switch?
Whoops.  I must have typo'd somewhere when I did the initial grep
for these functions in the include files for my various systems.
getcwd is indeed the preferred code and is found on newer systems,
not getwd.

Sorry for the confusion.

jeff