Scripts/Serpentshrine Cavern: Fixed "The Lurker Above" achievement and removed hacks for the event

--HG--
branch : trunk

src/server/game/Entities/GameObject/GameObject.cpp

@@ -1040,6 +1040,14 @@ void GameObject::Use(Unit* user)
     uint32 spellId = 0;
     bool triggered = false;
 
+    if (Player* playerUser = user->ToPlayer())
+    {
+        if (sScriptMgr->OnGossipHello(playerUser, this))
+            return;
+
+        AI()->GossipHello(playerUser);
+    }
+
     switch(GetGoType())
     {
         case GAMEOBJECT_TYPE_DOOR:                          //0
@@ -1238,15 +1246,14 @@ void GameObject::Use(Unit* user)
         //fishing bobber
         case GAMEOBJECT_TYPE_FISHINGNODE:                   //17
         {
-            if (user->GetTypeId() != TYPEID_PLAYER)
+            Player* player = user->ToPlayer();
+            if (!player)
                 return;
 
-            Player* player = (Player*)user;
-
             if (player->GetGUID() != GetOwnerGUID())
                 return;
 
-            switch(getLootState())
+            switch (getLootState())
             {
                 case GO_READY:                              // ready for loot
                 {

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

@@ -294,11 +294,6 @@ void WorldSession::HandleGameObjectUseOpcode(WorldPacket & recv_data)
     if (!obj)
         return;
 
-    if (sScriptMgr->OnGossipHello(_player, obj))
-        return;
-
-    obj->AI()->GossipHello(_player);
-
     obj->Use(_player);
 }
 

src/server/game/Spells/SpellEffects.cpp

@@ -2631,12 +2631,19 @@ void Spell::EffectEnergizePct(SpellEffIndex effIndex)
 
 void Spell::SendLoot(uint64 guid, LootType loottype)
 {
-    Player* player = (Player*)m_caster;
+    Player* player = m_caster->ToPlayer();
     if (!player)
         return;
 
     if (gameObjTarget)
     {
+        // special case, already has GossipHello inside so return and avoid calling twice
+        if (gameObjTarget->GetGoType() == GAMEOBJECT_TYPE_GOOBER)
+        {
+            gameObjTarget->Use(m_caster);
+            return;
+        }
+
         if (sScriptMgr->OnGossipHello(player, gameObjTarget))
             return;
 
@@ -2662,10 +2669,6 @@ void Spell::SendLoot(uint64 guid, LootType loottype)
                     gameObjTarget->TriggeringLinkedGameObject(trapEntry,m_caster);
                 return;
 
-            case GAMEOBJECT_TYPE_GOOBER:
-                gameObjTarget->Use(m_caster);
-                return;
-
             case GAMEOBJECT_TYPE_CHEST:
                 // TODO: possible must be moved to loot release (in different from linked triggering)
                 if (gameObjTarget->GetGOInfo()->chest.eventId)