framework/araui: Fix build error (unused variable)
framework/araui: Fix build error (unused variable)

Except RGB888 mode, there was a build error
It is fixed

sunghan-chang/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,Samsung/TizenRT,davidfather/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,jsdosa/TizenRT,jeongchanKim/TizenRT,chanijjani/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,jsdosa/TizenRT,chanijjani/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,chanijjani/TizenRT,Samsung/TizenRT,davidfather/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,jeongchanKim/TizenRT,davidfather/TizenRT,jsdosa/TizenRT,an4967/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,jeongarmy/TizenRT,junmin-kim/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT,an4967/TizenRT,davidfather/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,chanijjani/TizenRT,sunghan-chang/TizenRT,sunghan-chang/TizenRT,an4967/TizenRT,jsdosa/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,jsdosa/TizenRT,Samsung/TizenRT,davidfather/TizenRT,chanijjani/TizenRT