Function adjust_job_counter

plugins/timestream.cpp:469–478

need to manually adjust job completion_timer values for jobs that are controlled by unit actions with a timer of 1, which are destroyed immediately after they are created. longer-lived unit actions are already sufficiently handled by dfhack.units.subtractGroupActionTimers(). this will also decrement timers for jobs with actions that have just expired, but on average, this should balance out to be

// should balance out to be correct, since we're losing time when we subtract from the action timers
// and cap the value so it never drops below 1.
static void adjust_job_counter(df::unit * unit, int32_t timeskip) {
    auto job = unit->job.current_job;
    if (!job)
        return;
    for (auto action : unit->actions) {
        if (action->type == df::unit_action_type::Job || action->type == df::unit_action_type::JobRecover)
            return;
    }
    decrement_counter(job, &df::job::completion_timer, timeskip);
}

// unit needs appear to be incremented on season ticks, so we don't need to worry about those
// since the TICK_TRIGGERS check makes sure that we never skip season ticks