Native rendering in OpenVg backend doesn't work well with scissoring.

In OpenVg backend native rendering between beginNativePainting() and endNativePainting() is not working well with scissoring. If the user set scissoring in between those calls the scissoring that is actually set by OpenVg backend is not getting reloaded after calling endNativePainting().

In the QVGPaintEngine::updateScissor(), the function all ways return from the below location, when called from endNativePainting().

if (d->scissorActive && region == d->scissorRegion)
return;