core: repair CV_Assert() messages

Multi-argument CV_Assert() is accessible via CV_Assert_N() (with malformed messages).

samples/dnn/text_detection.cpp

@@ -33,9 +33,16 @@ int main(int argc, char** argv)
     float nmsThreshold = parser.get<float>("nms");
     int inpWidth = parser.get<int>("width");
     int inpHeight = parser.get<int>("height");
-    CV_Assert(parser.has("model"));
     String model = parser.get<String>("model");
 
+    if (!parser.check())
+    {
+        parser.printErrors();
+        return 1;
+    }
+
+    CV_Assert(!model.empty());
+
     // Load network.
     Net net = readNet(model);
 
@@ -113,9 +120,9 @@ void decode(const Mat& scores, const Mat& geometry, float scoreThresh,
             std::vector<RotatedRect>& detections, std::vector<float>& confidences)
 {
     detections.clear();
-    CV_Assert(scores.dims == 4, geometry.dims == 4, scores.size[0] == 1,
-              geometry.size[0] == 1, scores.size[1] == 1, geometry.size[1] == 5,
-              scores.size[2] == geometry.size[2], scores.size[3] == geometry.size[3]);
+    CV_Assert(scores.dims == 4); CV_Assert(geometry.dims == 4); CV_Assert(scores.size[0] == 1);
+    CV_Assert(geometry.size[0] == 1); CV_Assert(scores.size[1] == 1); CV_Assert(geometry.size[1] == 5);
+    CV_Assert(scores.size[2] == geometry.size[2]); CV_Assert(scores.size[3] == geometry.size[3]);
 
     const int height = scores.size[2];
     const int width = scores.size[3];