# unit's hitpoints drop by $dehydration_loss, but cannot kill it
[if]
    [variable]
        name=dehydrating_units[$i].hitpoints
        greater_than=$dehydration_loss
    [/variable]
    [then]
        {VARIABLE_OP dehydrating_units[$i].hitpoints add -$dehydration_loss}
    [/then]
    [else]
        {VARIABLE dehydrating_units[$i].hitpoints 1}
    [/else]
[/if]

-->

-- HP drops by dehydration_loss, but cannot drop to zero.
u.hitpoints = math.max(1, u.hitpoints - dehydration_loss)