The camera_calibration sample has a bug where when using fisheye and with a video as the source, the corrected image is almost entirely empty except for the 1-4 pixels closest to the origin. This is because fisheye::undistortImage uses an identity as the output camera matrix by default, and therefore maps all points very close to (0,0).

This fix is to use fisheye::estimateNewCameraMatrixForUndistortRectify to create the output camera matrix, in the same manner that it is used when images are used as the calibration source.

Also, there are two added guards around calibration flags for calibrateCameraRO that are not applicable to fisheye::calibrate.

relates #7040

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