Core/Handler : Fix Sharing quest

http://www.elitepvpers.com/forum/wow-exploits-hacks-tools-macros/1836723-wow-quest-sharing-exploit-item-dupe-co.html

src/server/game/Handlers/QuestHandler.cpp

@@ -580,7 +580,7 @@ void WorldSession::HandlePushQuestToParty(WorldPacket& recvPacket)
                     continue;
                 }
 
-                player->PlayerTalkClass->SendQuestGiverQuestDetails(quest, player->GetGUID(), true);
+                player->PlayerTalkClass->SendQuestGiverQuestDetails(quest, _player->GetGUID(), true);
                 player->SetDivider(_player->GetGUID());
             }
         }