bug#13289: 24.2; bookmark didn't save when using emacsclient

[Chong Yidong]

Chong Yidong <cyd@gnu.org> writes:

> The reason is the following.  The above call to `pp' contains a call to
> `scan-lists' which is enclosed in `ignore-errors'.  Normally, the error
> is caught and `pp' goes on to do its job.  However, because the hook is
> being run while Emacs is in a sigterm handler waiting to die (so that
> waiting_for_input is true), the Fsignal aborts Emacs instead of
> signalling a Lisp error:

The straightforward fix---setting waiting_for_input to 0 in
Fkill_emacs---seems to work fine, so I went ahead and committed it to
trunk.