Core/Movement: Don't send heartbeat message only to self on movementflag update. Should solve some recent issues with vehicles.

src/server/game/Entities/Unit/Unit.cpp

@@ -14643,7 +14643,7 @@ void Unit::SendMovementFlagUpdate()
 {
     WorldPacket data;
     BuildHeartBeatMsg(&data);
-    SendMessageToSet(&data, true);
+    SendMessageToSet(&data, false);
 }
 
 bool Unit::IsSitState() const
@@ -17050,9 +17050,7 @@ void Unit::_ExitVehicle(Position const* exitPosition)
     if (Player* player = ToPlayer())
         player->ResummonPetTemporaryUnSummonedIfAny();
 
-    WorldPacket data2;
-    BuildHeartBeatMsg(&data2);
-    SendMessageToSet(&data2, true);
+    SendMovementFlagUpdate();
 
     if (vehicle->GetBase()->HasUnitTypeMask(UNIT_MASK_MINION))
         if (((Minion*)vehicle->GetBase())->GetOwner() == this)