Core/Phases: Some changes to how phasing works

(cherry picked from commit e4f6cb39a2652455b78ae2416627954956c8964f)

src/server/game/Instances/InstanceScript.cpp

@@ -631,5 +631,5 @@ void InstanceScript::UpdatePhasing()
     Map::PlayerList const& players = instance->GetPlayers();
     for (Map::PlayerList::const_iterator itr = players.begin(); itr != players.end(); ++itr)
         if (Player* player = itr->GetSource())
-            player->UpdatePhasing();
+            player->SendUpdatePhasing();
 }