use the new-style headers in the samples to improve OpenCV build time.

samples/c/bgfg_codebook.cpp

@@ -21,13 +21,14 @@
      ISBN-10: 0596516134 or: ISBN-13: 978-0596516130    
 ************************************************** */
 
-#include "cvaux.h"
-#include "cxmisc.h"
-#include "highgui.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
 
+#include <opencv2/video/background_segm.hpp>
+#include <opencv2/imgproc/imgproc_c.h>
+#include <opencv2/highgui/highgui.hpp>
+
 //VARIABLES for CODEBOOK METHOD:
 CvBGCodeBookModel* model = 0;
 const int NCHANNELS = 3;
@@ -220,7 +221,7 @@ int main(int argc, char** argv)
                 if( ch[n] )
                 {
                     int v = ptr[n] + (c == 'i' || c == 'l' ? 1 : -1);
-                    ptr[n] = CV_CAST_8U(v);
+                    ptr[n] = cv::saturate_cast<uchar>(v);
                 }
                 printf("%d,", ptr[n]);
             }