fix videostab compilation without CUDA

modules/videostab/src/global_motion.cpp

@@ -47,6 +47,8 @@
 #include "opencv2/opencv_modules.hpp"
 #include "clp.hpp"
 
+#include "opencv2/core/private.cuda.hpp"
+
 #if !defined HAVE_CUDA || defined(CUDA_DISABLER)
 
 namespace cv { namespace cuda {

modules/videostab/src/wobble_suppression.cpp

@@ -44,6 +44,8 @@
 #include "opencv2/videostab/wobble_suppression.hpp"
 #include "opencv2/videostab/ring_buffer.hpp"
 
+#include "opencv2/core/private.cuda.hpp"
+
 #ifdef HAVE_OPENCV_CUDAWARPING
 #  include "opencv2/cudawarping.hpp"
 #endif