title: OpenCV Cannot find MatND_
body: <p>I was trying to update OpenCV (to 2.4.9) when I ran into a problem. I cannot find the file that defines "MatND_". In the old version of OpenCV it was in cxcore.cpp. I searched through google, the CV documentation and the new OpenCV library and found a lot of information regarding MatND but nothing relevant about MatND_.  Does anyone know where I can find it?  Thank you for your time.</p>