- Reworked the __putc() and putc() macros to reference the 'c' input

parameter only once, and to be free of side-effects when tinkering
  with the buffer position.

- isatty() had the __fd_lock() call in the wrong place, which could have
  led to cleanup problems later.

- The close action in the stdio, socket and termios hook code now
  also zaps the fd pointer itself after cleaning up the file descriptor
  table entry.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15211 87f5fb63-7c3d-0410-a384-fd976d0f7a62

library/socket_hook_entry.c

@@ -1,5 +1,5 @@
 /*
- * $Id: socket_hook_entry.c,v 1.17 2006-11-16 10:41:15 obarthel Exp $
+ * $Id: socket_hook_entry.c,v 1.18 2010-10-20 13:12:58 obarthel Exp $
  *
  * :ts=4
  *
@@ -145,6 +145,8 @@ __socket_hook_entry(
 			/* And that's the last for this file descriptor. */
 			memset(fd,0,sizeof(*fd));
 
+			fd = NULL;
+
 			break;
 
 		case file_action_seek: