fix warning from cross

Summary: Don't call tensor.cross() without dim, to avoid new warning.

Reviewed By: MichaelRamamonjisoa

Differential Revision: D49879590

fbshipit-source-id: e9ba83923b6dc3bcface6782b8b26729ab5b0a4c

pytorch3d/csrc/pulsar/pytorch/camera.h

@@ -37,7 +37,7 @@ inline void fill_cam_vecs(
   res->pixel_dir_y.x = pixel_dir_y.data_ptr<float>()[0];
   res->pixel_dir_y.y = pixel_dir_y.data_ptr<float>()[1];
   res->pixel_dir_y.z = pixel_dir_y.data_ptr<float>()[2];
-  auto sensor_dir_z = pixel_dir_y.cross(pixel_dir_x);
+  auto sensor_dir_z = pixel_dir_y.cross(pixel_dir_x, -1);
   sensor_dir_z /= sensor_dir_z.norm();
   if (right_handed) {
     sensor_dir_z *= -1.f;