ch7 pose_estimation_3d3d.cpp argument naming

[Tershire]

Line 37, the function prototype for bundleAdjustment,

void bundleAdjustment( const vector<Point3f> &points_3d, const vector<Point3f> &points_2d, Mat &R, Mat &t );

I believe that the argument name _points3d, _points2d is better to be changed to pts1, pts2 .

Thanks.