Fix compilation error with USE_TILES=1 and -Werror=maybe-uninitialized
Fix compilation error with USE_TILES=1 and -Werror=maybe-uninitialized

lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar