title: Darknet framework fails to start with GPU acceleration using CUDA
body: <p>I was trying to run Darknet with GPU acceleration using CUDA API. So I followed instructions from here, changed GPU=1 in Makefile and started make.
  When I'm trying to run test it fails due to CUDA Error.</p>
  
  <blockquote>
    <p>./darknet yolo test cfg/yolo.cfg yolo.weights data/dog.jpg CUDA Error:
    unknown error darknet: ./src/cuda.c:21: check_error: Assertion `0'
    failed.</p>
  </blockquote>
  
  <p>I'm using Ubuntu 14.04, CUDA 7.5 and my NVIDIA-SMI 352.93 and Driver Version: 352.93 on Titan X
  I'm pretty sure that my CUDA works fine and driver's version is up to date, because I'm using it to accelerate Caffe.
  My guess is that Darknet cannot locate CUDA directory.</p>
  
  <p>Can anyone help me with that issue?</p>