fix race between timer firing vs. alarm_timer->pending = 0
The period for Win32 timers is very short and always the same independent of dynticks, so it's possible that the timer fires before qemu_run_all_timers has reset alarm_timer->pending to zero. Reset alarm_timer->pending before rearming. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
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