*Use m_caster as caster of triggered spell in EffectTriggerSpell handler.

*Correct stance check in handleShapeshiftBoosts - by Sarjuuk
*Minor cleanup in Unit.cpp.

--HG--
branch : trunk

src/game/DuelHandler.cpp

@@ -76,7 +76,7 @@ void WorldSession::HandleDuelCancelledOpcode(WorldPacket& recvPacket)
         if(GetPlayer()->duel->opponent)
             GetPlayer()->duel->opponent->CombatStopWithPets(true);
 
-        GetPlayer()->CastSpell(GetPlayer(), 7267, true);    // beg
+        GetPlayer()->CastSpell(GetPlayer(), SPELL_ID_DUEL_BEG, true);    // beg
         GetPlayer()->DuelComplete(DUEL_WON);
         return;
     }