Minor improvements for OnFirstLogin hook
Minor improvements for OnFirstLogin hook

it can be casted with AT_LOGIN_FIRST flag check

azerothcore/azerothcore-wotlk,Helias/azerothcore-wotlk,mygithome002/azerothcore-wotlk,Nefertumm/azerothcore-wotlk,Helias/azerothcore-wotlk,azerothcore/azerothcore-wotlk,mygithome002/azerothcore-wotlk,jokerlfm/azerothcore-wotlk,Helias/azerothcore-wotlk,azerothcore/azerothcore-wotlk,jokerlfm/azerothcore-wotlk,Nefertumm/azerothcore-wotlk,jokerlfm/azerothcore-wotlk,Nefertumm/azerothcore-wotlk,jokerlfm/azerothcore-wotlk,mygithome002/azerothcore-wotlk,Nefertumm/azerothcore-wotlk,jokerlfm/azerothcore-wotlk,mygithome002/azerothcore-wotlk,ShinDarth/azerothcore-wotlk,jokerlfm/azerothcore-wotlk,azerothcore/azerothcore-wotlk,Helias/azerothcore-wotlk,azerothcore/azerothcore-wotlk,ShinDarth/azerothcore-wotlk,Nefertumm/azerothcore-wotlk,ShinDarth/azerothcore-wotlk,mygithome002/azerothcore-wotlk,azerothcore/azerothcore-wotlk,Nefertumm/azerothcore-wotlk,ShinDarth/azerothcore-wotlk,Helias/azerothcore-wotlk,mygithome002/azerothcore-wotlk,Helias/azerothcore-wotlk