[7359] Fixed crash when removing battleground from BGFreeSlotQueue. Author: Triply

Fixed player will now drop a flag before he logs out, if he is in BG.

--HG--
branch : trunk

src/game/BattleGroundMgr.cpp

@@ -646,8 +646,9 @@ void BattleGroundQueue::Update(BattleGroundTypeId bgTypeId, BGQueueIdBasedOnLeve
 
     //battleground with free slot for player should be always in the beggining of the queue
     // maybe it would be better to create bgfreeslotqueue for each queue_id_based_on_level
+    bool continueAdding = true;
     BGFreeSlotQueueType::iterator itr, next;
-    for (itr = sBattleGroundMgr.BGFreeSlotQueue[bgTypeId].begin(); itr != sBattleGroundMgr.BGFreeSlotQueue[bgTypeId].end(); itr = next)
+    for (itr = sBattleGroundMgr.BGFreeSlotQueue[bgTypeId].begin(); continueAdding && itr != sBattleGroundMgr.BGFreeSlotQueue[bgTypeId].end(); itr = next)
     {
         next = itr;
         ++next;
@@ -673,6 +674,8 @@ void BattleGroundQueue::Update(BattleGroundTypeId bgTypeId, BGQueueIdBasedOnLeve
 
             if( !bg->HasFreeSlots() )
             {
+                if( next == sBattleGroundMgr.BGFreeSlotQueue[bgTypeId].end() )
+                    continueAdding = false;
                 // remove BG from BGFreeSlotQueue
                 bg->RemoveFromBGFreeSlotQueue();
             }