fix grinding recipes and craft recipe for tool workshop

RealBadAngel

2013-04-05 8d092c9ec89e9c8dc2b5f7badc1560734a046dd8

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function get_item_meta (string)
    if string.find(string, "return {") then
        return minetest.deserialize(string)
    else return nil
    end
end
 
function set_item_meta (table)
    return minetest.serialize(table)
end