bug#141: Process sentinel not called in batch mode

[Stefan Monnier]

>> This problem occurs because wait_reading_process_output only calls
>> status_notify when given a nonzero DO_DISPLAY argument (process.c:4451).
>> Although wait_reading_process_output is called from many places in
>> Emacs, it is given a nonzero DO_DISPLAY argument only during
>> kbd_buffer_get_event.  But that function is never called in batch mode.

>     Does anyone know why we test do_display there?

> I think the idea is, if you are going to update the display, it is
> good to display the fact that a process has terminated.

This side I understand, but what about the other: why should we not
check process status in the case where we are not redisplaying?


        Stefan