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

samples/c/polar_transforms.c

@@ -1,16 +1,8 @@
-#ifdef _CH_
-#pragma package <opencv>
-#endif
+#include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/highgui/highgui.hpp"
 
-#define CV_NO_BACKWARD_COMPATIBILITY
-
-#ifndef _EiC
-#include "cv.h"
-#include "highgui.h"
 #include <ctype.h>
 #include <stdio.h>
-#endif
-
 
 int main( int argc, char** argv )
 {