i386.c warnings cleanup

[Jeffrey A Law]

  In message < 199802100349.WAA07459@subrogation.cygnus.com >you write:
  >    Date: Tue, 10 Feb 1998 04:15:43 +0100
  >    From: Marc Lehmann <pcg@goof.com>
  > 
  >    +extern void error PVPROTO((char *s, ...));
  >    +extern int atoi PROTO((char *));
  >    +extern void bcopy PROTO((void *, void *, int n));
  >    +extern void set_float_handler PROTO((jmp_buf));
  >    +extern void free PROTO((void *));
  > 
  > It's safest to never declare system functions, but to instead get the
  > declarations from system header files.  That's because on old systems
  > you can't predict how the functions will be declared.  For example,
  > the SunOS <stdlib.h> declares free as returning int.
  > 
  > You should instead simply include the correct header files, and trust
  > them.
Agreed.  And if a prototype is absolutely necessary then you
make it conditional on NEED_DECLARATION_xxxxx

jeff