[533] NPE when closing panel
[533] NPE when closing panel

saav/HubTurbo,ianngiaw/HubTurbo,Sumei1009/HubTurbo,gaieepo/HubTurbo,HyungJon/HubTurbo,ianngiaw/HubTurbo,gaieepo/HubTurbo,HyungJon/HubTurbo,Honoo/HubTurbo,Honoo/HubTurbo,Sumei1009/HubTurbo,saav/HubTurbo