Fix warnings

modules/xobjdetect/src/waldboost.cpp

@@ -292,7 +292,7 @@ void WaldBoost::fit(Mat& data_pos, Mat& data_neg)
         }
         double cascade_threshold = -1;
         minMaxIdx(pos_trace, &cascade_threshold);
-        cascade_thresholds_.push_back(cascade_threshold);
+        cascade_thresholds_.push_back((float)cascade_threshold);
 
         std::cerr << "i=" << std::setw(4) << i;
         std::cerr << " feat=" << std::setw(5) << min_feature_ind;

modules/xobjdetect/src/wbdetector.cpp

@@ -120,7 +120,7 @@ void WBDetectorImpl::train(
 
     const int stages[] = {64, 128, 256, 512, 1024};
     const int stage_count = sizeof(stages) / sizeof(*stages);
-    const int stage_neg = pos_imgs.size() * 5;
+    const int stage_neg = (int)(pos_imgs.size() * 5);
     const int max_per_image = 100;
 
     const float scales_arr[] = {.3f, .4f, .5f, .6f, .7f, .8f, .9f, 1.0f};