Cleanup duplicate call (#522)

Luke aka SwissalpS

2019-12-25 76a39e71b9f81531e14efd7ec1b0accfefa0fa66

 technic/machines/HV/forcefield.lua

@@ -121,6 +121,12 @@
end

local forcefield_receive_fields = function(pos, formname, fields, sender)
   local player_name = sender:get_player_name()
   if minetest.is_protected(pos, player_name) then
      minetest.chat_send_player(player_name, "You are not allowed to edit this!")
      minetest.record_protection_violation(pos, player_name)
      return
   end
   local meta = minetest.get_meta(pos)
   local range = nil
   if fields.range then