Fixed segmentation fault while running stereo KITTI example

[Muhammad0312]

While running stereo example, it resulted in a segmentation fault. Problem: When cameraType_ is specified as RECTIFIED originalCalib2_ object is not created in the Settings::readCamera2 method, but in the operator overload operator<< it prints these settings to the terminal which results in segmentation fault. Solution: Added a conditional to not print the settings for second camera if RECTIFIED is specified.