WinRT core compatibility fixes

Update system.cpp

Update system.cpp

Update ocl.cpp

Update matching.cpp

Update ocl.cpp

Update matching.cpp

modules/objdetect/src/matching.cpp

@@ -525,7 +525,9 @@ int addNullableBorder(CvLSVMFeatureMap *map, int bx, int by)
     float *new_map;
     sizeX = map->sizeX + 2 * bx;
     sizeY = map->sizeY + 2 * by;
-    new_map = (float *)malloc(sizeof(float) * sizeX * sizeY * map->numFeatures);
+    // fix for Windows Phone 8 ARM compiler
+    size_t size = sizeof(float) * sizeX * sizeY * map->numFeatures;
+    new_map = (float *)malloc(size);
     for (i = 0; i < sizeX * sizeY * map->numFeatures; i++)
     {
         new_map[i] = 0.0;