Core/Players: Fix crash in LoadFromDB

Closes #4724
Closes #4673

src/server/game/Entities/Player/Player.cpp

@@ -16657,6 +16657,7 @@ bool Player::LoadFromDB(uint32 guid, SQLQueryHolder *holder)
     _LoadInstanceTimeRestrictions(holder->GetPreparedResult(PLAYER_LOGIN_QUERY_LOADINSTANCELOCKTIMES));
     _LoadBGData(holder->GetPreparedResult(PLAYER_LOGIN_QUERY_LOADBGDATA));
 
+    GetSession()->SetPlayer(this);
     MapEntry const* mapEntry = sMapStore.LookupEntry(mapId);
     if (!mapEntry || !IsPositionValid())
     {

src/server/game/Server/Protocol/Handlers/CharacterHandler.cpp

@@ -776,6 +776,7 @@ void WorldSession::HandlePlayerLogin(LoginQueryHolder* holder)
     // "GetAccountId() == db stored account id" checked in LoadFromDB (prevent login not own character using cheating tools)
     if (!pCurrChar->LoadFromDB(GUID_LOPART(playerGuid), holder))
     {
+        SetPlayer(NULL);
         KickPlayer();                                       // disconnect client, player no set to session and it will not deleted or saved at kick
         delete pCurrChar;                                   // delete it manually
         delete holder;                                      // delete all unprocessed queries
@@ -784,9 +785,6 @@ void WorldSession::HandlePlayerLogin(LoginQueryHolder* holder)
     }
 
     pCurrChar->GetMotionMaster()->Initialize();
-
-    SetPlayer(pCurrChar);
-
     pCurrChar->SendDungeonDifficulty(false);
 
     WorldPacket data(SMSG_LOGIN_VERIFY_WORLD, 20);