Prevent crash at access to deleted social data for player.

Remove social data at logout instead ~Player that called also for temporary Player object for Player::MinimalLoadFromDB call.

src/game/Player.cpp

@@ -426,10 +426,8 @@ Player::~Player ()
 {
     CleanupsBeforeDelete();
 
-    if(m_uint32Values)                                      // only for fully created Object
-    {
-        sSocialMgr.RemovePlayerSocial(GetGUIDLow());
-    }
+    // it must be unloaded already in PlayerLogout and accessed only for loggined player
+    //m_social = NULL;
 
     // Note: buy back item already deleted from DB when player was saved
     for(int i = 0; i < PLAYER_SLOTS_COUNT; ++i)

src/game/SpellEffects.cpp

@@ -4945,7 +4945,7 @@ void Spell::EffectDuel(uint32 i)
     Player *target = (Player*)unitTarget;
 
     // caster or target already have requested duel
-    if( caster->duel || target->duel || target->GetSocial()->HasIgnore(caster->GetGUIDLow()) )
+    if( caster->duel || target->duel || !target->GetSocial() || target->GetSocial()->HasIgnore(caster->GetGUIDLow()) )
         return;
 
     // Players can only fight a duel with each other outside (=not inside dungeons and not in capital cities)

src/game/WorldSession.cpp

@@ -380,6 +380,7 @@ void WorldSession::LogoutPlayer(bool Save)
         ///- Delete the player object
         _player->CleanupsBeforeDelete();                    // do some cleanup before deleting to prevent crash at crossreferences to already deleted data
 
+        sSocialMgr.RemovePlayerSocial (_player->GetGUIDLow ());
         delete _player;
         _player = NULL;