Core/Misc: Added missing virtual destructor

src/server/game/Battlefield/Battlefield.h

@@ -163,6 +163,7 @@ class TC_GAME_API BfGraveyard
 {
     public:
         BfGraveyard(Battlefield* Bf);
+        virtual ~BfGraveyard() = default;
 
         // Method to changing who controls the graveyard
         void GiveControlTo(TeamId team);