bug#7248: In term, SIGWINCH is delayed until a key is typed

[Rob Browning]

It appears that a SIGWINCH to a make-term is being delayed until a key
is typed.

To reproduce:

  Create sigwinch-test:

    #!/usr/bin/env perl
    use strict;

    $SIG{'WINCH'} = sub { print "SIGWINCH at ".localtime()."\n" };
    sleep 120;

  Create sigwinch-test.el:

    (set-buffer (apply 'make-term "SIGWINCH Test" "./sigwinch-test" nil))
    (term-mode)
    (term-char-mode)
    (switch-to-buffer "*SIGWINCH Test*")

  Then:

    1. Run "emacs -q --no-splash -l sigwinch-test.el" under X11.
    2. Resize the Emacs window.
    3. Type a key.

The SIGWINCH is delayed until the key is typed instead of being sent
immediately.  Here's the original report:

  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=583373

Is that the expected behavior?

Thanks
-- 
Rob Browning
rlb @defaultvalue.org and @debian.org
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