*Set seer back when it is removed to prevent crash.

--HG--
branch : trunk

src/game/MiscHandler.cpp

@@ -1442,8 +1442,8 @@ void WorldSession::HandleFarSightOpcode( WorldPacket & recv_data )
             _player->SetSeer(_player);
             break;
         case 1:
-            sLog.outDebug("Added FarSight " I64FMT " to player %u", _player->GetFarSightGUID(), _player->GetGUIDLow());
-            if(WorldObject *target = _player->GetFarsightTarget())
+            sLog.outDebug("Added FarSight " I64FMT " to player %u", _player->GetUInt64Value(PLAYER_FARSIGHT), _player->GetGUIDLow());
+            if(WorldObject *target = _player->GetViewpoint())
                 _player->SetSeer(target);
             else
                 sLog.outError("Player %s requests non-existing seer", _player->GetName());

src/game/Player.cpp

@@ -20191,46 +20191,31 @@ void Player::HandleFallUnderMap()
     }
 }
 
-/*void Player::SetViewport(uint64 guid, bool moveable)
-{
-    WorldPacket data(SMSG_CLIENT_CONTROL_UPDATE, 8+1);
-    data.appendPackGUID(guid); // Packed guid of object to set client's view to
-    data << (moveable ? uint8(0x01) : uint8(0x00)); // 0 - can't move; 1 - can move
-    m_session->SendPacket(&data);
-    sLog.outDetail("Viewport for "I64FMT" (%s) changed to "I64FMT, GetGUID(), GetName(), guid);
-}*/
-
-WorldObject* Player::GetFarsightTarget() const
-{
-    // Players can have in farsight field another player's guid, a creature's guid, or a dynamic object's guid
-    if(uint64 guid = GetFarSightGUID())
-        return (WorldObject*)ObjectAccessor::GetObjectByTypeMask(*this, guid, TYPEMASK_SEER);
-    return NULL;
-}
-
 void Player::StopCastingBindSight()
 {
-    if (WorldObject* target = GetFarsightTarget())
+    if(WorldObject* target = GetViewpoint())
     {
-        if (target->isType(TYPEMASK_UNIT))
+        if(target->isType(TYPEMASK_UNIT))
             ((Unit*)target)->RemoveAuraTypeByCaster(SPELL_AURA_BIND_SIGHT, GetGUID());
     }
 }
 
-void Player::CreateSeer(WorldObject* target)
+void Player::CreateViewpoint(WorldObject* target)
 {
     if(!target || target == this) // remove seer
     {
-        sLog.outDebug("Player::CreateSeer: Player %s remove seer", GetName());
+        sLog.outDebug("Player::CreateViewpoint: Player %s remove seer", GetName());
         SetUInt64Value(PLAYER_FARSIGHT, 0);
         //WorldPacket data(SMSG_CLEAR_FAR_SIGHT_IMMEDIATE, 0);
         //GetSession()->SendPacket(&data);
         if(m_seer != this && m_seer->isType(TYPEMASK_UNIT))
             ((Unit*)m_seer)->RemovePlayerFromVision(this);
+        //must immediately set seer back otherwise may crash
+        m_seer = this;
     }
     else
     {
-        sLog.outDebug("Player::CreateSeer: Player %s create seer %u (TypeId: %u).", GetName(), target->GetEntry(), target->GetTypeId());
+        sLog.outDebug("Player::CreateViewpoint: Player %s create seer %u (TypeId: %u).", GetName(), target->GetEntry(), target->GetTypeId());
         StopCastingBindSight();
         SetUInt64Value(PLAYER_FARSIGHT, target->GetGUID());
         if(target->isType(TYPEMASK_UNIT))
@@ -20238,6 +20223,13 @@ void Player::CreateSeer(WorldObject* target)
     }
 }
 
+WorldObject* Player::GetViewpoint() const
+{
+    if(uint64 guid = GetUInt64Value(PLAYER_FARSIGHT))
+        return (WorldObject*)ObjectAccessor::GetObjectByTypeMask(*this, guid, TYPEMASK_SEER);
+    return NULL;
+}
+
 bool Player::CanUseBattleGroundObject()
 {
     return ( //InBattleGround() &&                          // in battleground - not need, check in other cases

src/game/Player.h

@@ -2057,16 +2057,12 @@ class TRINITY_DLL_SPEC Player : public Unit
         void EnterVehicle(Vehicle *vehicle);
         void ExitVehicle(Vehicle *vehicle);
 
-        void SetMover(Unit* target) { CreateSeer(target); m_mover = target; }
-        void CreateSeer(WorldObject *target);
+        void SetMover(Unit* target) { CreateViewpoint(target); m_mover = target; }
         void SetSeer(WorldObject *target) { m_seer = target; }
+        void CreateViewpoint(WorldObject *target);
+        WorldObject* GetViewpoint() const;
         void StopCastingCharm() { Uncharm(); }
         void StopCastingBindSight();
-        uint64 GetFarSightGUID() const { return GetUInt64Value(PLAYER_FARSIGHT); }
-        WorldObject* GetFarsightTarget() const;
-        // Controls if vision is currently on farsight object, updated in FAR_SIGHT opcode
-        void SetFarsightVision(bool apply) { m_farsightVision = apply; }
-        bool HasFarsightVision() const { return m_farsightVision; }
 
         // Transports
         Transport * GetTransport() const { return m_transport; }

src/game/SpellAuras.cpp

@@ -2001,7 +2001,7 @@ void Aura::HandleAuraDummy(bool apply, bool Real)
         if( m_target->GetTypeId() == TYPEID_PLAYER && GetSpellProto()->Effect[0]==72 )
         {
             // spells with SpellEffect=72 and aura=4: 6196, 6197, 21171, 21425
-            ((Player*)m_target)->CreateSeer(NULL);
+            ((Player*)m_target)->CreateViewpoint(NULL);
             return;
         }
 
@@ -2949,7 +2949,7 @@ void Aura::HandleBindSight(bool apply, bool Real)
     if(!caster || caster->GetTypeId() != TYPEID_PLAYER)
         return;
 
-    ((Player*)caster)->CreateSeer(apply ? m_target : NULL);
+    ((Player*)caster)->CreateViewpoint(apply ? m_target : NULL);
 }
 
 void Aura::HandleFarSight(bool apply, bool Real)

src/game/SpellEffects.cpp

@@ -3657,7 +3657,7 @@ void Spell::EffectAddFarsight(uint32 i)
     dynObj->GetMap()->Add(dynObj); //grid will also be loaded
 
     // Need to update visibility of object for client to accept farsight guid
-    ((Player*)m_caster)->CreateSeer(dynObj);
+    ((Player*)m_caster)->CreateViewpoint(dynObj);
     //((Player*)m_caster)->UpdateVisibilityOf(dynObj);
 }