Supply converter: demany only the needed power (#577)

ZettaScript

2022-10-20 718a5beda197cd0a775fd41aedfb5b1bbd5d1d8b

 technic/tools/vacuum.lua

@@ -44,7 +44,7 @@
            end
         end
      end
		

      technic.set_RE_wear(itemstack, meta.charge, vacuum_max_charge)
      itemstack:set_metadata(minetest.serialize(meta))
      return itemstack