Removing rng_seed arg in order to maintain ABI compatibility. Hardcoding seed

modules/calib3d/include/opencv2/calib3d/calib3d.hpp

@@ -488,8 +488,7 @@ CV_EXPORTS_W void solvePnPRansac( InputArray objectPoints,
                                   float reprojectionError = 8.0,
                                   int minInliersCount = 100,
                                   OutputArray inliers = noArray(),
-                                  int flags = ITERATIVE,
-                                  int rng_seed = 0);
+                                  int flags = ITERATIVE);
 
 //! initializes camera matrix from a few 3D points and the corresponding projections.
 CV_EXPORTS_W Mat initCameraMatrix2D( InputArrayOfArrays objectPoints,

modules/calib3d/src/solvepnp.cpp

@@ -303,8 +303,9 @@ void cv::solvePnPRansac(InputArray _opoints, InputArray _ipoints,
                         InputArray _cameraMatrix, InputArray _distCoeffs,
                         OutputArray _rvec, OutputArray _tvec, bool useExtrinsicGuess,
                         int iterationsCount, float reprojectionError, int minInliersCount,
-                        OutputArray _inliers, int flags, int _rng_seed)
+                        OutputArray _inliers, int flags)
 {
+    const int _rng_seed = 0;
     Mat opoints = _opoints.getMat(), ipoints = _ipoints.getMat();
     Mat cameraMatrix = _cameraMatrix.getMat(), distCoeffs = _distCoeffs.getMat();