* Attempt to fix a crash in AuctionHouseObject::Update()

--HG--
branch : trunk

src/game/AuctionHouseMgr.cpp

@@ -504,10 +504,16 @@ void AuctionHouseObject::Update()
     time_t curTime = sWorld.GetGameTime();
     ///- Handle expired auctions
 
+    // If storage is empty, no need to update.
+    if (AuctionsMap.empty())
+        return;
+
     // reset next if at end of map
     if (next == AuctionsMap.end())
         next = AuctionsMap.begin();
 
+    ASSERT(next != NULL);
+
     uint32 loopBreaker = 0;
 
     // Initialize itr with next. next is stored for future calls to Update() after