nil at info.lang_code ==> crash at login

[Thomas WW Wiegand]

under server engine 5.2.0 the

• logging.lua
• at line 7
  " lang_code: " .. info.lang_code
  leads to crash when clients join (5.2.0 or 5.4.1 tested/seen)

my solution:

• logging.lua
• comment out line 7 (easy version), but need to delete the both ",," at end of line 6 !
• enlarge new code after

if info.lang_code == nil then
        msg = msg .. " lang_code: nil"
    else
        msg = msg .. " lang_code: " .. info.lang_code
    end