Fixing build with CUDA enabled

modules/gpu/CMakeLists.txt

@@ -28,7 +28,7 @@ if (HAVE_CUDA)
   set(ncv_files ${ncv_srcs} ${ncv_hdrs} ${ncv_cuda})
 
   source_group("Src\\NVidia" FILES ${ncv_files})
-  include_directories("src/nvidia/core" "src/nvidia/NPP_staging" ${CUDA_INCLUDE_DIRS})
+  include_directories("src/nvidia" "src/nvidia/core" "src/nvidia/NPP_staging" ${CUDA_INCLUDE_DIRS})
 
   #set (CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-keep")
   #set (CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-Xcompiler;/EHsc-;")

samples/gpu/opticalflow_nvidia_api.cpp

@@ -12,6 +12,7 @@
 #include <iostream>
 #include <iomanip>
 #include "opencv2/gpu/gpu.hpp"
+#include "opencv2/highgui/highgui.hpp"
 
 #ifdef HAVE_CUDA
 #include "NPP_staging/NPP_staging.hpp"