integration/luprex/core/lua/basics.lua

makeclass('NilIsZero') -- This is intended to be used as a metatable
makeclass('login')

function NilIsZero.__index(t,k)
  return 0
  end

function NilIsZero.__newindex(t,k,v)
  if v~=nil and v~=0 then rawset(t,k,v) end
  end