[rfc] Fix some nasty casts

[Andrew Cagney <ac131313 at cygnus dot com>]

Hello,

The attatched eliminates some nasty and unnecessary casts that assumed
sizeof(int) == sizeof(void*).

I've run the testsuite and had a long hard stare at the changes but ....
:-)

	Andrew
Thu Feb  1 00:29:42 2001  Andrew Cagney  <cagney@redhat.com>

	* sol-thread.c (restore_inferior_pid): Save the PID in a freshly
 	allocated buffer.
	(save_inferior_pid): Restore the PID from that tempoary
 	buffer. Delete the buffer.
	* utils.c (make_cleanup_close, do_close_cleanup): Ditto for FD.

Index: sol-thread.c
===================================================================
RCS file: /cvs/src/src/gdb/sol-thread.c,v
retrieving revision 1.20
diff -p -r1.20 sol-thread.c
*** sol-thread.c	2001/01/24 21:01:02	1.20
--- sol-thread.c	2001/02/01 18:27:00
*************** lwp_to_thread (int lwp)
*** 424,436 ****
  static struct cleanup *
  save_inferior_pid (void)
  {
!   return make_cleanup (restore_inferior_pid, (void *) inferior_pid);
  }
  
  static void
! restore_inferior_pid (void *pid)
  {
!   inferior_pid = (int) pid;
  }
  
  
--- 424,440 ----
  static struct cleanup *
  save_inferior_pid (void)
  {
!   int *saved_pid = xmalloc (sizeof (int));
!   *saved_pid = inferior_pid;
!   return make_cleanup (restore_inferior_pid, saved_pid);
  }
  
  static void
! restore_inferior_pid (void *data)
  {
!   int *saved_pid = data;
!   inferior_pid = *saved_pid;
!   xfree (saved_pid);
  }
  
  
Index: utils.c
===================================================================
RCS file: /cvs/src/src/gdb/utils.c,v
retrieving revision 1.27
diff -p -r1.27 utils.c
*** utils.c	2001/01/31 03:46:23	1.27
--- utils.c	2001/02/01 18:27:03
*************** make_cleanup_bfd_close (bfd *abfd)
*** 215,228 ****
  static void
  do_close_cleanup (void *arg)
  {
!   close ((int) arg);
  }
  
  struct cleanup *
  make_cleanup_close (int fd)
  {
!   /* int into void*. Outch!! */
!   return make_cleanup (do_close_cleanup, (void *) fd);
  }
  
  static void
--- 215,231 ----
  static void
  do_close_cleanup (void *arg)
  {
!   int *fd = arg;
!   close (*fd);
!   xfree (fd);
  }
  
  struct cleanup *
  make_cleanup_close (int fd)
  {
!   int *saved_fd = xmalloc (sizeof (fd));
!   *saved_fd = fd;
!   return make_cleanup (do_close_cleanup, saved_fd);
  }
  
  static void