hauler_type.Bin is inaccurate #438

Originally posted by @ab9rf in #435 (comment)

My research suggests that we should rename Bin to something else. Specifically, StoreItemInHospital jobs increment world.stockpile.num_jobs[Bin], even though a "store in hospital" job never result in anything being actually stored in a bin.

        pjVar38 = job::create();
        piVar42 = local_440;
        pjVar38->job_type = StoreItemInHospital;
...
        world.stockpile.num_jobs.Any = world.stockpile.num_jobs.Any + 1;
        world.stockpile.num_jobs.Bin = world.stockpile.num_jobs.Bin + 1;