* filesys.c (scm_close, set_element, get_element, scm_chown,

* filesys.c (scm_close, set_element, get_element, scm_chown,
scm_chmod, scm_stat, scm_truncate_file, scm_fcntl, scm_fsync): Use
SCM_COERCE_OUTPORT to cope with the printstate/port magic.
* ports.c (scm_port_revealed, scm_set_port_revealed_x,
scm_close_port, scm_port_line, scm_set_port_line_x,
scm_port_column, scm_set_port_column_x, scm_port_filename,
scm_set_port_filename_x, scm_port_mode,
scm_close_all_ports_except, scm_set_current_output_port,
scm_set_current_error_port): Likewise
* ioext.c (scm_redirect_port, scm_dup_to_fdes, scm_freopen,
scm_ftell, scm_fileno, scm_isatty_p, scm_primitive_move_to_fdes):
Likewise
* posix.c (scm_ttyname, scm_tcgetpgrp, scm_tcsetpgrp): Likewise
* backtrace.c (display_backtrace_body): Likewise
* fports (scm_setvbuf): Likewise
* socket.c (scm_getsockopt, scm_setsockopt, scm_shutdown,
scm_connect, scm_bind, scm_listen, scm_accept, scm_getsockname,
scm_getpeername, scm_send, scm_sendto): Likewise
* unif.c (scm_uniform_array_write): Likewise