fixed inconsistent new/delete operators

modules/objdetect/src/hog.cpp

@@ -2627,7 +2627,7 @@ void HOGDescriptor::readALTModel(std::string modelfile)
 
        detector.push_back((float)-linearbias);
        setSVMDetector(detector);
-       delete linearwt;
+       delete [] linearwt;
    } else {
        throw Exception();
    }