System Information

OpenCV version: 4.x && 5.x
Operating System / Platform: Win32

Detailed description

After getting the device name, VariantClear was not used to clearn varName.

// opencv/modules/videoio/src/cap_dshow.cpp

int videoInput::listDevices(bool silent) {
    // ...
    VARIANT varName;
    VariantInit(&varName); // not using VariantClear
    // ...
}

Steps to reproduce

None

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)