fix(Core/DungeonFinder): Fixed joining to LFG dungeon if there is alr… (#10062)

* fix(Core/DungeonFinder): Fixed joining to LFG dungeon if there is already a LFG group inside it.iterator

Fixes #9824

* Buildfix.

src/server/game/DungeonFinding/LFGGroupData.cpp

@@ -22,7 +22,7 @@
 namespace lfg
 {
     LfgGroupData::LfgGroupData(): m_State(LFG_STATE_NONE), m_OldState(LFG_STATE_NONE),
-        m_Dungeon(0), m_KicksLeft(sWorld->getIntConfig(CONFIG_LFG_MAX_KICK_COUNT))
+        m_Dungeon(0), _isLFGGroup(false), m_KicksLeft(sWorld->getIntConfig(CONFIG_LFG_MAX_KICK_COUNT))
     { }
 
     LfgGroupData::~LfgGroupData()
@@ -30,11 +30,23 @@ namespace lfg
 
     bool LfgGroupData::IsLfgGroup()
     {
-        return m_OldState != LFG_STATE_NONE;
+        return _isLFGGroup;
     }
 
     void LfgGroupData::SetState(LfgState state)
     {
+        switch (state)
+        {
+            case LFG_STATE_DUNGEON:
+                _isLFGGroup = true;
+                break;
+            case LFG_STATE_FINISHED_DUNGEON:
+                _isLFGGroup = false;
+                break;
+            default:
+                break;
+        }
+
         switch (state)
         {
             case LFG_STATE_NONE:

src/server/game/DungeonFinding/LFGGroupData.h

@@ -68,6 +68,7 @@ namespace lfg
         LfgGuidSet m_Players;                              ///< Players in group
         // Dungeon
         uint32 m_Dungeon;                                  ///< Dungeon entry
+        bool _isLFGGroup;
         // Vote Kick
         uint8 m_KicksLeft;                                 ///< Number of kicks left
     };

src/server/game/DungeonFinding/LFGQueue.cpp

@@ -407,7 +407,7 @@ namespace lfg
         }
 
         proposal.queues = strGuids;
-        proposal.isNew = numLfgGroups != 1 || sLFGMgr->GetOldState(proposal.group) != LFG_STATE_DUNGEON;
+        proposal.isNew = numLfgGroups != 1;
 
         if (!sLFGMgr->AllQueued(check)) // can't create proposal
             return LFG_COMPATIBILITY_PENDING;