Fixed behavior if missing library cudnn.lib

AlexeyAB

2017-01-15 3b9afd4cd2efcfeb9699f1d9658c8509e08e58fb

 src/voxel.c

@@ -5,6 +5,7 @@

#ifdef OPENCV
#include "opencv2/highgui/highgui_c.h"
image get_image_from_stream(CvCapture *cap);
#endif

void extract_voxel(char *lfile, char *rfile, char *prefix)