Samples: fixed samples build in case the viz module is disabled

Author: mshabunin

samples/cpp/CMakeLists.txt

@@ -33,7 +33,7 @@ endif()
 if(NOT HAVE_opencv_cudaarithm OR NOT HAVE_opencv_cudafilters)
   ocv_list_filterout(cpp_samples "/gpu/")
 endif()
-if(NOT VTK_USE_FILE)
+if(NOT BUILD_opencv_viz OR NOT VTK_USE_FILE)
   ocv_list_filterout(cpp_samples "/viz/")
 endif()
 if(NOT HAVE_IPP_A)