Remaining mineable asteroids calculated incorrectly for respawn mechanic

[Graendal]

From the scripts/sector/background/respawnresourceasteroids.lua:

function RespawnResourceAsteroids.respawnRichAsteroids()
    local sector = Sector()
    local richAsteroids = sector:getNumEntitiesByComponent(ComponentType.MineableMaterial)
    local numAsteroids = sector:getNumEntitiesByType(EntityType.Asteroid)

    if numAsteroids == 0 then return end
    if richAsteroids / numAsteroids > self.respawningThreshold then return end

    ...
end

Correct me if I'm wrong, but it looks like the line

local richAsteroids = sector:getNumEntitiesByComponent(ComponentType.MineableMaterial)

includes wreckages in the total number of rich asteroids because wreckages also have the component type of 'MineableMaterial'.  I'm thinking the fix is as easy as:

local richAsteroids = sector:getNumEntitiesByComponent(ComponentType.MineableMaterial) - sector:getNumEntitiesByType(EntityType.Wreckage)