fix lazy rand affine

Author: function2-llx

monai/transforms/spatial/array.py

@@ -2523,6 +2523,7 @@ def __call__(
         img = convert_to_tensor(img, track_meta=get_track_meta())
         if lazy_:
             if self._do_transform:
+                self.rand_affine_grid(sp_size, randomize=False, lazy=True)
                 affine = self.rand_affine_grid.get_transformation_matrix()
             else:
                 affine = convert_to_dst_type(torch.eye(len(sp_size) + 1), img, dtype=self.rand_affine_grid.dtype)[0]