Memory Leak Issue with CvtColor BGR2RGBA

[llopen]

Problem Description：
The current implementation has potential memory leak issues when performing color space conversion from BGR to RGBA using CvtColor，

//1. This way of writing will cause memory leaks。Although mat.Dispose() is called, the memory is not released
Mat ct = mat.CvtColor(ColorConversionCodes.BGR2RGBA); // Convert channel order
mat.Dispose();
mat = ct;
//2. This way of writing does not leak
Cv2.CvtColor(mat, mat, ColorConversionCodes.RGB2RGBA);

[llopen]

correct: Cv2.CvtColor(mat, mat, ColorConversionCodes.RGB2RGBA) => Cv2.CvtColor(mat, mat, ColorConversionCodes.BGR2RGBA)
but the result is sample