(make_cleanup_ftype): New typedef. Make signature consistent with
other function typedefs. Document as not be used out side of
make_cleanup code. Use in make_cleanup declarations.
+ (null_cleanup): Replace PTR with void*.
* utils.c (make_cleanup, make_final_cleanup, make_run_cleanup,
make_exec_cleanup, make_exec_error_cleanup, make_my_cleanup,
extern void free_current_contents (char **);
-extern void null_cleanup (PTR);
+extern void null_cleanup (void *);
extern int myread (int, char *, int);