firepony: Only load CUDA runtime if CUDA is enabled
firepony: Only load CUDA runtime if CUDA is enabled

NVlabs/firepony,NVlabs/firepony,broadinstitute/firepony,NVlabs/firepony,NVlabs/firepony,broadinstitute/firepony,broadinstitute/firepony,broadinstitute/firepony