rplight: Fix redundant `get_lens()` calls

contrib/src/rplight/pssmCameraRig.cxx

@@ -296,9 +296,10 @@ void PSSMCameraRig::compute_pssm_splits(const LMatrix4& transform, float max_dis
 
     // Reset the film size, offset and far-plane
     Camera* cam = DCAST(Camera, _cam_nodes[i].node());
-    cam->get_lens()->set_film_size(1, 1);
-    cam->get_lens()->set_film_offset(0, 0);
-    cam->get_lens()->set_near_far(1, 100);
+    Lens *lens = cam->get_lens();
+    lens->set_film_size(1, 1);
+    lens->set_film_offset(0, 0);
+    lens->set_near_far(1, 100);
 
     // Find a good initial position
     _cam_nodes[i].set_pos(cam_start);
@@ -320,16 +321,16 @@ void PSSMCameraRig::compute_pssm_splits(const LMatrix4& transform, float max_dis
       if (_max_film_sizes[i].get_x() < film_size.get_x()) _max_film_sizes[i].set_x(film_size.get_x());
       if (_max_film_sizes[i].get_y() < film_size.get_y()) _max_film_sizes[i].set_y(film_size.get_y());
 
-      cam->get_lens()->set_film_size(_max_film_sizes[i] * filmsize_bias);
+      lens->set_film_size(_max_film_sizes[i] * filmsize_bias);
     } else {
       // If we don't use a fixed film size, we can just set the film size
       // on the lens.
-      cam->get_lens()->set_film_size(film_size * filmsize_bias);
+      lens->set_film_size(film_size * filmsize_bias);
     }
 
     // Compute new film offset
-    cam->get_lens()->set_film_offset(film_offset);
-    cam->get_lens()->set_near_far(10, best_max_extent.get_z());
+    lens->set_film_offset(film_offset);
+    lens->set_near_far(10, best_max_extent.get_z());
     _camera_nearfar[i] = LVecBase2(10, best_max_extent.get_z());
 
     // Compute the camera MVP