Moleworm lacks nil check for making new home

In brains/molebrain.lua:

local function MakeNewHomeAction(inst)
    local angle = math.random(0,360)
    local offset = FindGroundOffset(inst:GetPosition(), angle*DEGREES, math.random(5,15), 120, false, false)
    return BufferedAction(inst, nil, ACTIONS.MAKEMOLEHILL, nil, inst:GetPosition() + offset)
end

Despite looking for an offset 120 times(why 120?), it still might not find one, and the game would crash when trying to add nil and Vector3 together.