Small change to compile when CUDA toolkit not installed
Small change to compile when CUDA toolkit not installed

saedrna/flann,atulkum/flann,atulkum/flann,egtann/flann,egtann/flann,kypp/flann,atulkum/flann,saedrna/flann,saedrna/flann,kyroskoh/flann,kypp/flann,egtann/flann,kypp/flann,egtann/flann,saedrna/flann,kyroskoh/flann,kypp/flann,kypp/flann,kyroskoh/flann,atulkum/flann,kypp/flann,atulkum/flann,kyroskoh/flann,egtann/flann,saedrna/flann,kyroskoh/flann,egtann/flann,saedrna/flann,atulkum/flann