ensure auto created rendering surfaces are released when the window is destroyed.
ensure auto created rendering surfaces are released when the window is destroyed.

ruleless/CEGUI,OpenTechEngine/CEGUI,ruleless/CEGUI,ruleless/CEGUI,OpenTechEngine/CEGUI,OpenTechEngine/CEGUI,OpenTechEngine/CEGUI,ruleless/CEGUI