eliminate all the warnings on win32 and win64

add a new function abssum
fix the bug of test and perf because someone remove non-free module from cmakelist.txt

modules/ocl/test/precomp.hpp

@@ -55,13 +55,13 @@
 #include "cvconfig.h"
 #include "opencv2/core/core.hpp"
 #include "opencv2/highgui/highgui.hpp"
-#include "opencv2/calib3d/calib3d.hpp"
+//#include "opencv2/calib3d/calib3d.hpp"
 #include "opencv2/imgproc/imgproc.hpp"
 #include "opencv2/video/video.hpp"
 #include "opencv2/ts/ts.hpp"
 #include "opencv2/ts/ts_perf.hpp"
 #include "opencv2/ocl/ocl.hpp"
-#include "opencv2/nonfree/nonfree.hpp"
+//#include "opencv2/nonfree/nonfree.hpp"
 
 #include "utility.hpp"
 #include "interpolation.hpp"

modules/ocl/test/test_hog.cpp

@@ -199,8 +199,8 @@ TEST_P(HOG, Detect)
 
     int threshold = 10;
     int val = 32;
-    d_comp[0] = d_found.size();
-    comp[0] = found.size();
+    d_comp[0] = (int)d_found.size();
+    comp[0] = (int)found.size();
     if (winSize == cv::Size(48, 96))
     {
         for(int i = 0; i < (int)d_found.size(); i++)

modules/ocl/test/test_imgproc.cpp

@@ -213,8 +213,8 @@ COOR do_meanShift(int x0, int y0, uchar *sptr, uchar *dptr, int sstep, cv::Size
     dptr[3] = (uchar)c3;
 
     COOR coor;
-    coor.x = x0;
-    coor.y = y0;
+    coor.x = (short)x0;
+    coor.y = (short)y0;
     return coor;
 }