Core/Creature: Do not reward XP for creatures without any loot recipient. (XP fix part for the "pet-only"-kills)

--HG--
branch : trunk

src/server/game/Entities/Player/Player.cpp

@@ -2639,6 +2639,9 @@ void Player::GiveXP(uint32 xp, Unit *victim, float group_rate)
     if (HasFlag(PLAYER_FLAGS, PLAYER_FLAGS_NO_XP_GAIN))
         return;
 
+    if (victim && victim->GetTypeId() == TYPEID_UNIT && !victim->ToCreature()->hasLootRecipient())
+        return;
+
     uint8 level = getLevel();
 
     sScriptMgr.OnGivePlayerXP(this, xp, victim);