fix retrieval of detections count

modules/gpu/src/cuda/isf-sc.cu

@@ -313,7 +313,7 @@ namespace icf {
         dim3 block(32, 8);
         dim3 grid(fw, fh / 8, (scale == -1) ? downscales : 1);
 
-        uint* ctr = (uint*)counter.ptr();
+        uint* ctr = (uint*)(counter.ptr(0));
         Detection* det = (Detection*)objects.ptr();
         uint max_det = objects.cols / sizeof(Detection);
 

modules/gpu/src/softcascade.cpp

@@ -541,7 +541,7 @@ void cv::gpu::SoftCascade::detectMultiScale(const GpuMat& colored, const GpuMat&
     flds.detect(specificScale, rois, objects, 0);
 
     cv::Mat out(flds.detCounter);
-    int ndetections = *(out.data);
+    int ndetections = *(out.ptr<int>(0));
 
     if (! ndetections)
         objects = GpuMat();

modules/gpu/test/test_softcascade.cpp

@@ -257,5 +257,9 @@ TEST(SoftCascadeTest, detect)
     cv::gpu::transpose(rois, trois);
 
     cascade.detectMultiScale(colored, trois, objectBoxes);
+
+    typedef cv::gpu::SoftCascade::Detection Detection;
+    cv::Mat detections(objectBoxes);
+    ASSERT_EQ(detections.cols / sizeof(Detection) ,3670U);
 }
 #endif